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Finding the Fourth Proportional to 292,274.92, 438,153.18 and 142,431.40

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Solution

The fourth proportional to 292,274.92, 438,153.18 and 142,431.40 is: 213,520.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,274.92 : 438,153.18 = 142,431.40 : x
  2. Step 2: Convert to fraction form
    292,274.92/438,153.18 = 142,431.40/x
  3. Step 3: Cross multiply
    292,274.92x = 438,153.18 × 142,431.40
  4. Step 4: Simplify right side
    292,274.92x = 62,406,770,841.85
  5. Step 5: Solve for x
    x = 62,406,770,841.85/292,274.92
  6. Step 6: Final answer
    x = 213,520.79

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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.