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Finding the Fourth Proportional to 438.71, 658.61 and 195.35

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Solution

The fourth proportional to 438.71, 658.61 and 195.35 is: 293.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.71 : 658.61 = 195.35 : x
  2. Step 2: Convert to fraction form
    438.71/658.61 = 195.35/x
  3. Step 3: Cross multiply
    438.71x = 658.61 × 195.35
  4. Step 4: Simplify right side
    438.71x = 128,659.46
  5. Step 5: Solve for x
    x = 128,659.46/438.71
  6. Step 6: Final answer
    x = 293.27

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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.