Home / 651,815.20-977,139.60-427,283.20

Finding the Fourth Proportional to 651,815.20, 977,139.60 and 427,283.20

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Solution

The fourth proportional to 651,815.20, 977,139.60 and 427,283.20 is: 640,542.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,815.20 : 977,139.60 = 427,283.20 : x
  2. Step 2: Convert to fraction form
    651,815.20/977,139.60 = 427,283.20/x
  3. Step 3: Cross multiply
    651,815.20x = 977,139.60 × 427,283.20
  4. Step 4: Simplify right side
    651,815.20x = 417,515,335,134.72
  5. Step 5: Solve for x
    x = 417,515,335,134.72/651,815.20
  6. Step 6: Final answer
    x = 640,542.50

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Half scale
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Double scale
Find fourth proportional to 651,816.20, 977,141.10 and 427,284.20
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.