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Finding the Fourth Proportional to 641,688.60, 963,479.12 and 357,933.56

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Solution

The fourth proportional to 641,688.60, 963,479.12 and 357,933.56 is: 537,428.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,688.60 : 963,479.12 = 357,933.56 : x
  2. Step 2: Convert to fraction form
    641,688.60/963,479.12 = 357,933.56/x
  3. Step 3: Cross multiply
    641,688.60x = 963,479.12 × 357,933.56
  4. Step 4: Simplify right side
    641,688.60x = 344,861,511,407.27
  5. Step 5: Solve for x
    x = 344,861,511,407.27/641,688.60
  6. Step 6: Final answer
    x = 537,428.14

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1.5x scale

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.