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Finding the Fourth Proportional to 642,760.68, 887,052.42 and 356,292.84

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Solution

The fourth proportional to 642,760.68, 887,052.42 and 356,292.84 is: 491,707.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,760.68 : 887,052.42 = 356,292.84 : x
  2. Step 2: Convert to fraction form
    642,760.68/887,052.42 = 356,292.84/x
  3. Step 3: Cross multiply
    642,760.68x = 887,052.42 × 356,292.84
  4. Step 4: Simplify right side
    642,760.68x = 316,050,425,950.67
  5. Step 5: Solve for x
    x = 316,050,425,950.67/642,760.68
  6. Step 6: Final answer
    x = 491,707.78

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1.5x scale

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.