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Finding the Fourth Proportional to 721.95, 1,082.79 and 234.96

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Solution

The fourth proportional to 721.95, 1,082.79 and 234.96 is: 352.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.95 : 1,082.79 = 234.96 : x
  2. Step 2: Convert to fraction form
    721.95/1,082.79 = 234.96/x
  3. Step 3: Cross multiply
    721.95x = 1,082.79 × 234.96
  4. Step 4: Simplify right side
    721.95x = 254,412.34
  5. Step 5: Solve for x
    x = 254,412.34/721.95
  6. Step 6: Final answer
    x = 352.40

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1.5x scale

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.