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Finding the Fourth Proportional to 768,423.72, 1,060,326.88 and 428,906.28

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Solution

The fourth proportional to 768,423.72, 1,060,326.88 and 428,906.28 is: 591,836.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,423.72 : 1,060,326.88 = 428,906.28 : x
  2. Step 2: Convert to fraction form
    768,423.72/1,060,326.88 = 428,906.28/x
  3. Step 3: Cross multiply
    768,423.72x = 1,060,326.88 × 428,906.28
  4. Step 4: Simplify right side
    768,423.72x = 454,780,857,684.81
  5. Step 5: Solve for x
    x = 454,780,857,684.81/768,423.72
  6. Step 6: Final answer
    x = 591,836.05

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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.