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Finding the Fourth Proportional to 724.64, 1,085.10 and 450.32

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Solution

The fourth proportional to 724.64, 1,085.10 and 450.32 is: 674.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.64 : 1,085.10 = 450.32 : x
  2. Step 2: Convert to fraction form
    724.64/1,085.10 = 450.32/x
  3. Step 3: Cross multiply
    724.64x = 1,085.10 × 450.32
  4. Step 4: Simplify right side
    724.64x = 488,642.23
  5. Step 5: Solve for x
    x = 488,642.23/724.64
  6. Step 6: Final answer
    x = 674.32

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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.