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Finding the Fourth Proportional to 311,530.92, 429,912.12 and 168,290.52

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Solution

The fourth proportional to 311,530.92, 429,912.12 and 168,290.52 is: 232,240.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,530.92 : 429,912.12 = 168,290.52 : x
  2. Step 2: Convert to fraction form
    311,530.92/429,912.12 = 168,290.52/x
  3. Step 3: Cross multiply
    311,530.92x = 429,912.12 × 168,290.52
  4. Step 4: Simplify right side
    311,530.92x = 72,350,134,229.10
  5. Step 5: Solve for x
    x = 72,350,134,229.10/311,530.92
  6. Step 6: Final answer
    x = 232,240.62

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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.