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Finding the Fourth Proportional to 354.78, 532.44 and 135.47

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Solution

The fourth proportional to 354.78, 532.44 and 135.47 is: 203.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.78 : 532.44 = 135.47 : x
  2. Step 2: Convert to fraction form
    354.78/532.44 = 135.47/x
  3. Step 3: Cross multiply
    354.78x = 532.44 × 135.47
  4. Step 4: Simplify right side
    354.78x = 72,130.98
  5. Step 5: Solve for x
    x = 72,130.98/354.78
  6. Step 6: Final answer
    x = 203.31

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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.