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Finding the Fourth Proportional to 438.77, 658.07 and 219.32

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Solution

The fourth proportional to 438.77, 658.07 and 219.32 is: 328.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.77 : 658.07 = 219.32 : x
  2. Step 2: Convert to fraction form
    438.77/658.07 = 219.32/x
  3. Step 3: Cross multiply
    438.77x = 658.07 × 219.32
  4. Step 4: Simplify right side
    438.77x = 144,323.53
  5. Step 5: Solve for x
    x = 144,323.53/438.77
  6. Step 6: Final answer
    x = 328.93

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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.