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Finding the Fourth Proportional to 1,314.11, 1,813.50 and 724.65

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Solution

The fourth proportional to 1,314.11, 1,813.50 and 724.65 is: 1,000.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.11 : 1,813.50 = 724.65 : x
  2. Step 2: Convert to fraction form
    1,314.11/1,813.50 = 724.65/x
  3. Step 3: Cross multiply
    1,314.11x = 1,813.50 × 724.65
  4. Step 4: Simplify right side
    1,314.11x = 1,314,152.78
  5. Step 5: Solve for x
    x = 1,314,152.78/1,314.11
  6. Step 6: Final answer
    x = 1,000.04

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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.