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Finding the Fourth Proportional to 292,127.81, 438,211.69 and 172,359.79

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Solution

The fourth proportional to 292,127.81, 438,211.69 and 172,359.79 is: 258,551.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,127.81 : 438,211.69 = 172,359.79 : x
  2. Step 2: Convert to fraction form
    292,127.81/438,211.69 = 172,359.79/x
  3. Step 3: Cross multiply
    292,127.81x = 438,211.69 × 172,359.79
  4. Step 4: Simplify right side
    292,127.81x = 75,530,073,337.52
  5. Step 5: Solve for x
    x = 75,530,073,337.52/292,127.81
  6. Step 6: Final answer
    x = 258,551.47

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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.