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Finding the Fourth Proportional to 358.60, 537.90 and 115.13

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Solution

The fourth proportional to 358.60, 537.90 and 115.13 is: 172.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.60 : 537.90 = 115.13 : x
  2. Step 2: Convert to fraction form
    358.60/537.90 = 115.13/x
  3. Step 3: Cross multiply
    358.60x = 537.90 × 115.13
  4. Step 4: Simplify right side
    358.60x = 61,928.43
  5. Step 5: Solve for x
    x = 61,928.43/358.60
  6. Step 6: Final answer
    x = 172.70

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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.