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Finding the Fourth Proportional to 765,332.62, 1,055,805.64 and 493,487.84

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Solution

The fourth proportional to 765,332.62, 1,055,805.64 and 493,487.84 is: 680,785.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,332.62 : 1,055,805.64 = 493,487.84 : x
  2. Step 2: Convert to fraction form
    765,332.62/1,055,805.64 = 493,487.84/x
  3. Step 3: Cross multiply
    765,332.62x = 1,055,805.64 × 493,487.84
  4. Step 4: Simplify right side
    765,332.62x = 521,027,236,996.95
  5. Step 5: Solve for x
    x = 521,027,236,996.95/765,332.62
  6. Step 6: Final answer
    x = 680,785.35

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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.