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Finding the Fourth Proportional to 724.41, 1,081.36 and 636.83

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Solution

The fourth proportional to 724.41, 1,081.36 and 636.83 is: 950.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.41 : 1,081.36 = 636.83 : x
  2. Step 2: Convert to fraction form
    724.41/1,081.36 = 636.83/x
  3. Step 3: Cross multiply
    724.41x = 1,081.36 × 636.83
  4. Step 4: Simplify right side
    724.41x = 688,642.49
  5. Step 5: Solve for x
    x = 688,642.49/724.41
  6. Step 6: Final answer
    x = 950.63

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.