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Finding the Fourth Proportional to 259.92, 358.70 and 149.42

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Solution

The fourth proportional to 259.92, 358.70 and 149.42 is: 206.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.92 : 358.70 = 149.42 : x
  2. Step 2: Convert to fraction form
    259.92/358.70 = 149.42/x
  3. Step 3: Cross multiply
    259.92x = 358.70 × 149.42
  4. Step 4: Simplify right side
    259.92x = 53,594.41
  5. Step 5: Solve for x
    x = 53,594.41/259.92
  6. Step 6: Final answer
    x = 206.20

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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.