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Finding the Fourth Proportional to 765,808.95, 1,056,798.86 and 479,486.91

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Solution

The fourth proportional to 765,808.95, 1,056,798.86 and 479,486.91 is: 661,680.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,808.95 : 1,056,798.86 = 479,486.91 : x
  2. Step 2: Convert to fraction form
    765,808.95/1,056,798.86 = 479,486.91/x
  3. Step 3: Cross multiply
    765,808.95x = 1,056,798.86 × 479,486.91
  4. Step 4: Simplify right side
    765,808.95x = 506,721,217,475.49
  5. Step 5: Solve for x
    x = 506,721,217,475.49/765,808.95
  6. Step 6: Final answer
    x = 661,680.98

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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.