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Finding the Fourth Proportional to 288.52, 432.68 and 115.16

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Solution

The fourth proportional to 288.52, 432.68 and 115.16 is: 172.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.52 : 432.68 = 115.16 : x
  2. Step 2: Convert to fraction form
    288.52/432.68 = 115.16/x
  3. Step 3: Cross multiply
    288.52x = 432.68 × 115.16
  4. Step 4: Simplify right side
    288.52x = 49,827.43
  5. Step 5: Solve for x
    x = 49,827.43/288.52
  6. Step 6: Final answer
    x = 172.70

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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.