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Finding the Fourth Proportional to 980.85, 1,353.56 and 532.72

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Solution

The fourth proportional to 980.85, 1,353.56 and 532.72 is: 735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.85 : 1,353.56 = 532.72 : x
  2. Step 2: Convert to fraction form
    980.85/1,353.56 = 532.72/x
  3. Step 3: Cross multiply
    980.85x = 1,353.56 × 532.72
  4. Step 4: Simplify right side
    980.85x = 721,068.95
  5. Step 5: Solve for x
    x = 721,068.95/980.85
  6. Step 6: Final answer
    x = 735.15

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.