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Finding the Fourth Proportional to 409.60, 614.56 and 153.12

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Solution

The fourth proportional to 409.60, 614.56 and 153.12 is: 229.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.60 : 614.56 = 153.12 : x
  2. Step 2: Convert to fraction form
    409.60/614.56 = 153.12/x
  3. Step 3: Cross multiply
    409.60x = 614.56 × 153.12
  4. Step 4: Simplify right side
    409.60x = 94,101.43
  5. Step 5: Solve for x
    x = 94,101.43/409.60
  6. Step 6: Final answer
    x = 229.74

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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.