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Finding the Fourth Proportional to 399,591.16, 551,446.61 and 238,539.67

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Solution

The fourth proportional to 399,591.16, 551,446.61 and 238,539.67 is: 329,191.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,591.16 : 551,446.61 = 238,539.67 : x
  2. Step 2: Convert to fraction form
    399,591.16/551,446.61 = 238,539.67/x
  3. Step 3: Cross multiply
    399,591.16x = 551,446.61 × 238,539.67
  4. Step 4: Simplify right side
    399,591.16x = 131,541,889,800.70
  5. Step 5: Solve for x
    x = 131,541,889,800.70/399,591.16
  6. Step 6: Final answer
    x = 329,191.19

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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.