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Finding the Fourth Proportional to 768,385.92, 1,060,472.88 and 428,924.64

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Solution

The fourth proportional to 768,385.92, 1,060,472.88 and 428,924.64 is: 591,972.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,385.92 : 1,060,472.88 = 428,924.64 : x
  2. Step 2: Convert to fraction form
    768,385.92/1,060,472.88 = 428,924.64/x
  3. Step 3: Cross multiply
    768,385.92x = 1,060,472.88 × 428,924.64
  4. Step 4: Simplify right side
    768,385.92x = 454,862,948,283.76
  5. Step 5: Solve for x
    x = 454,862,948,283.76/768,385.92
  6. Step 6: Final answer
    x = 591,972.00

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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.