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Finding the Fourth Proportional to 292.34, 438.39 and 129.91

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Solution

The fourth proportional to 292.34, 438.39 and 129.91 is: 194.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.34 : 438.39 = 129.91 : x
  2. Step 2: Convert to fraction form
    292.34/438.39 = 129.91/x
  3. Step 3: Cross multiply
    292.34x = 438.39 × 129.91
  4. Step 4: Simplify right side
    292.34x = 56,951.24
  5. Step 5: Solve for x
    x = 56,951.24/292.34
  6. Step 6: Final answer
    x = 194.81

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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.