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Finding the Fourth Proportional to 765,793.64, 1,056,777.86 and 479,471.72

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Solution

The fourth proportional to 765,793.64, 1,056,777.86 and 479,471.72 is: 661,660.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,793.64 : 1,056,777.86 = 479,471.72 : x
  2. Step 2: Convert to fraction form
    765,793.64/1,056,777.86 = 479,471.72/x
  3. Step 3: Cross multiply
    765,793.64x = 1,056,777.86 × 479,471.72
  4. Step 4: Simplify right side
    765,793.64x = 506,695,098,192.12
  5. Step 5: Solve for x
    x = 506,695,098,192.12/765,793.64
  6. Step 6: Final answer
    x = 661,660.10

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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.