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Finding the Fourth Proportional to 663,463.76, 915,580 and 361,657.76

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Solution

The fourth proportional to 663,463.76, 915,580 and 361,657.76 is: 499,087.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,463.76 : 915,580 = 361,657.76 : x
  2. Step 2: Convert to fraction form
    663,463.76/915,580 = 361,657.76/x
  3. Step 3: Cross multiply
    663,463.76x = 915,580 × 361,657.76
  4. Step 4: Simplify right side
    663,463.76x = 331,126,611,900.80
  5. Step 5: Solve for x
    x = 331,126,611,900.80/663,463.76
  6. Step 6: Final answer
    x = 499,087.71

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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.