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Finding the Fourth Proportional to 935.25, 1,291.12 and 724.96

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Solution

The fourth proportional to 935.25, 1,291.12 and 724.96 is: 1,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.25 : 1,291.12 = 724.96 : x
  2. Step 2: Convert to fraction form
    935.25/1,291.12 = 724.96/x
  3. Step 3: Cross multiply
    935.25x = 1,291.12 × 724.96
  4. Step 4: Simplify right side
    935.25x = 936,002.89
  5. Step 5: Solve for x
    x = 936,002.89/935.25
  6. Step 6: Final answer
    x = 1,000.80

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1.5x scale

Why These Related Problems?

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