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Finding the Fourth Proportional to 261.52, 389.99 and 229.17

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Solution

The fourth proportional to 261.52, 389.99 and 229.17 is: 341.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.52 : 389.99 = 229.17 : x
  2. Step 2: Convert to fraction form
    261.52/389.99 = 229.17/x
  3. Step 3: Cross multiply
    261.52x = 389.99 × 229.17
  4. Step 4: Simplify right side
    261.52x = 89,374.87
  5. Step 5: Solve for x
    x = 89,374.87/261.52
  6. Step 6: Final answer
    x = 341.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.