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Finding the Fourth Proportional to 409.30, 614.04 and 135.38

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Solution

The fourth proportional to 409.30, 614.04 and 135.38 is: 203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.30 : 614.04 = 135.38 : x
  2. Step 2: Convert to fraction form
    409.30/614.04 = 135.38/x
  3. Step 3: Cross multiply
    409.30x = 614.04 × 135.38
  4. Step 4: Simplify right side
    409.30x = 83,126.31
  5. Step 5: Solve for x
    x = 83,126.31/409.30
  6. Step 6: Final answer
    x = 203.10

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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.