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Finding the Fourth Proportional to 658, 987.03 and 219.29

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Solution

The fourth proportional to 658, 987.03 and 219.29 is: 328.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    658 : 987.03 = 219.29 : x
  2. Step 2: Convert to fraction form
    658/987.03 = 219.29/x
  3. Step 3: Cross multiply
    658x = 987.03 × 219.29
  4. Step 4: Simplify right side
    658x = 216,445.81
  5. Step 5: Solve for x
    x = 216,445.81/658
  6. Step 6: Final answer
    x = 328.94

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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.