Home / 1,257,355,237.20-1,886,032,855.80-645,135,205.20

Finding the Fourth Proportional to 1,257,355,237.20, 1,886,032,855.80 and 645,135,205.20

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Solution

The fourth proportional to 1,257,355,237.20, 1,886,032,855.80 and 645,135,205.20 is: 967,702,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257,355,237.20 : 1,886,032,855.80 = 645,135,205.20 : x
  2. Step 2: Convert to fraction form
    1,257,355,237.20/1,886,032,855.80 = 645,135,205.20/x
  3. Step 3: Cross multiply
    1,257,355,237.20x = 1,886,032,855.80 × 645,135,205.20
  4. Step 4: Simplify right side
    1,257,355,237.20x = 1,216,746,193,440,475,136
  5. Step 5: Solve for x
    x = 1,216,746,193,440,475,136/1,257,355,237.20
  6. Step 6: Final answer
    x = 967,702,807.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.