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Finding the Fourth Proportional to 522,672.55, 721,200.68 and 307,855.38

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Solution

The fourth proportional to 522,672.55, 721,200.68 and 307,855.38 is: 424,788.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,672.55 : 721,200.68 = 307,855.38 : x
  2. Step 2: Convert to fraction form
    522,672.55/721,200.68 = 307,855.38/x
  3. Step 3: Cross multiply
    522,672.55x = 721,200.68 × 307,855.38
  4. Step 4: Simplify right side
    522,672.55x = 222,025,512,871.80
  5. Step 5: Solve for x
    x = 222,025,512,871.80/522,672.55
  6. Step 6: Final answer
    x = 424,788.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.