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Finding the Fourth Proportional to 438.96, 658.35 and 146.46

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Solution

The fourth proportional to 438.96, 658.35 and 146.46 is: 219.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.96 : 658.35 = 146.46 : x
  2. Step 2: Convert to fraction form
    438.96/658.35 = 146.46/x
  3. Step 3: Cross multiply
    438.96x = 658.35 × 146.46
  4. Step 4: Simplify right side
    438.96x = 96,421.94
  5. Step 5: Solve for x
    x = 96,421.94/438.96
  6. Step 6: Final answer
    x = 219.66

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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.