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Finding the Fourth Proportional to 641,687.91, 963,478.09 and 357,932.87

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Solution

The fourth proportional to 641,687.91, 963,478.09 and 357,932.87 is: 537,427.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,687.91 : 963,478.09 = 357,932.87 : x
  2. Step 2: Convert to fraction form
    641,687.91/963,478.09 = 357,932.87/x
  3. Step 3: Cross multiply
    641,687.91x = 963,478.09 × 357,932.87
  4. Step 4: Simplify right side
    641,687.91x = 344,860,473,118.43
  5. Step 5: Solve for x
    x = 344,860,473,118.43/641,687.91
  6. Step 6: Final answer
    x = 537,427.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.