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Finding the Fourth Proportional to 499,280.20, 748,142.70 and 432,406.60

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Solution

The fourth proportional to 499,280.20, 748,142.70 and 432,406.60 is: 647,936.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,280.20 : 748,142.70 = 432,406.60 : x
  2. Step 2: Convert to fraction form
    499,280.20/748,142.70 = 432,406.60/x
  3. Step 3: Cross multiply
    499,280.20x = 748,142.70 × 432,406.60
  4. Step 4: Simplify right side
    499,280.20x = 323,501,841,221.82
  5. Step 5: Solve for x
    x = 323,501,841,221.82/499,280.20
  6. Step 6: Final answer
    x = 647,936.45

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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.