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Finding the Fourth Proportional to 1,314.07, 1,813.39 and 724.66

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Solution

The fourth proportional to 1,314.07, 1,813.39 and 724.66 is: 1,000.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.07 : 1,813.39 = 724.66 : x
  2. Step 2: Convert to fraction form
    1,314.07/1,813.39 = 724.66/x
  3. Step 3: Cross multiply
    1,314.07x = 1,813.39 × 724.66
  4. Step 4: Simplify right side
    1,314.07x = 1,314,091.20
  5. Step 5: Solve for x
    x = 1,314,091.20/1,314.07
  6. Step 6: Final answer
    x = 1,000.02

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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.