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Finding the Fourth Proportional to 641,688.85, 963,479.49 and 357,933.79

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Solution

The fourth proportional to 641,688.85, 963,479.49 and 357,933.79 is: 537,428.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,688.85 : 963,479.49 = 357,933.79 : x
  2. Step 2: Convert to fraction form
    641,688.85/963,479.49 = 357,933.79/x
  3. Step 3: Cross multiply
    641,688.85x = 963,479.49 × 357,933.79
  4. Step 4: Simplify right side
    641,688.85x = 344,861,865,442.97
  5. Step 5: Solve for x
    x = 344,861,865,442.97/641,688.85
  6. Step 6: Final answer
    x = 537,428.48

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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.