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Finding the Fourth Proportional to 355,458.31, 533,134.90 and 130,766.20

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Solution

The fourth proportional to 355,458.31, 533,134.90 and 130,766.20 is: 196,129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,458.31 : 533,134.90 = 130,766.20 : x
  2. Step 2: Convert to fraction form
    355,458.31/533,134.90 = 130,766.20/x
  3. Step 3: Cross multiply
    355,458.31x = 533,134.90 × 130,766.20
  4. Step 4: Simplify right side
    355,458.31x = 69,716,024,960.38
  5. Step 5: Solve for x
    x = 69,716,024,960.38/355,458.31
  6. Step 6: Final answer
    x = 196,129.96

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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.