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Finding the Fourth Proportional to 438.72, 658.80 and 294.36

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Solution

The fourth proportional to 438.72, 658.80 and 294.36 is: 442.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.72 : 658.80 = 294.36 : x
  2. Step 2: Convert to fraction form
    438.72/658.80 = 294.36/x
  3. Step 3: Cross multiply
    438.72x = 658.80 × 294.36
  4. Step 4: Simplify right side
    438.72x = 193,924.37
  5. Step 5: Solve for x
    x = 193,924.37/438.72
  6. Step 6: Final answer
    x = 442.02

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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.