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Finding the Fourth Proportional to 409.53, 614.40 and 135.66

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Solution

The fourth proportional to 409.53, 614.40 and 135.66 is: 203.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.53 : 614.40 = 135.66 : x
  2. Step 2: Convert to fraction form
    409.53/614.40 = 135.66/x
  3. Step 3: Cross multiply
    409.53x = 614.40 × 135.66
  4. Step 4: Simplify right side
    409.53x = 83,349.50
  5. Step 5: Solve for x
    x = 83,349.50/409.53
  6. Step 6: Final answer
    x = 203.52

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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.