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Finding the Fourth Proportional to 355.08, 532.70 and 138.68

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Solution

The fourth proportional to 355.08, 532.70 and 138.68 is: 208.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.08 : 532.70 = 138.68 : x
  2. Step 2: Convert to fraction form
    355.08/532.70 = 138.68/x
  3. Step 3: Cross multiply
    355.08x = 532.70 × 138.68
  4. Step 4: Simplify right side
    355.08x = 73,871.48
  5. Step 5: Solve for x
    x = 73,871.48/355.08
  6. Step 6: Final answer
    x = 208.04

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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.