Home / 651,813.20-977,136.60-427,281.20

Finding the Fourth Proportional to 651,813.20, 977,136.60 and 427,281.20

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Solution

The fourth proportional to 651,813.20, 977,136.60 and 427,281.20 is: 640,539.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,813.20 : 977,136.60 = 427,281.20 : x
  2. Step 2: Convert to fraction form
    651,813.20/977,136.60 = 427,281.20/x
  3. Step 3: Cross multiply
    651,813.20x = 977,136.60 × 427,281.20
  4. Step 4: Simplify right side
    651,813.20x = 417,512,099,011.92
  5. Step 5: Solve for x
    x = 417,512,099,011.92/651,813.20
  6. Step 6: Final answer
    x = 640,539.50

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Half scale
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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.