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Finding the Fourth Proportional to 409.32, 614 and 135.41

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Solution

The fourth proportional to 409.32, 614 and 135.41 is: 203.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.32 : 614 = 135.41 : x
  2. Step 2: Convert to fraction form
    409.32/614 = 135.41/x
  3. Step 3: Cross multiply
    409.32x = 614 × 135.41
  4. Step 4: Simplify right side
    409.32x = 83,141.74
  5. Step 5: Solve for x
    x = 83,141.74/409.32
  6. Step 6: Final answer
    x = 203.12

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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.