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Finding the Fourth Proportional to 1,248.36, 1,723.32 and 724.30

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Solution

The fourth proportional to 1,248.36, 1,723.32 and 724.30 is: 999.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.36 : 1,723.32 = 724.30 : x
  2. Step 2: Convert to fraction form
    1,248.36/1,723.32 = 724.30/x
  3. Step 3: Cross multiply
    1,248.36x = 1,723.32 × 724.30
  4. Step 4: Simplify right side
    1,248.36x = 1,248,200.68
  5. Step 5: Solve for x
    x = 1,248,200.68/1,248.36
  6. Step 6: Final answer
    x = 999.87

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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.