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Finding the Fourth Proportional to 768,251.76, 1,060,060.64 and 428,719.20

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Solution

The fourth proportional to 768,251.76, 1,060,060.64 and 428,719.20 is: 591,561.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,251.76 : 1,060,060.64 = 428,719.20 : x
  2. Step 2: Convert to fraction form
    768,251.76/1,060,060.64 = 428,719.20/x
  3. Step 3: Cross multiply
    768,251.76x = 1,060,060.64 × 428,719.20
  4. Step 4: Simplify right side
    768,251.76x = 454,468,349,532.29
  5. Step 5: Solve for x
    x = 454,468,349,532.29/768,251.76
  6. Step 6: Final answer
    x = 591,561.74

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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.