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Finding the Fourth Proportional to 245.39, 338.58 and 152.17

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Solution

The fourth proportional to 245.39, 338.58 and 152.17 is: 209.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.39 : 338.58 = 152.17 : x
  2. Step 2: Convert to fraction form
    245.39/338.58 = 152.17/x
  3. Step 3: Cross multiply
    245.39x = 338.58 × 152.17
  4. Step 4: Simplify right side
    245.39x = 51,520.87
  5. Step 5: Solve for x
    x = 51,520.87/245.39
  6. Step 6: Final answer
    x = 209.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.