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Finding the Fourth Proportional to 1,097.22, 1,514.64 and 724.38

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Solution

The fourth proportional to 1,097.22, 1,514.64 and 724.38 is: 999.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.22 : 1,514.64 = 724.38 : x
  2. Step 2: Convert to fraction form
    1,097.22/1,514.64 = 724.38/x
  3. Step 3: Cross multiply
    1,097.22x = 1,514.64 × 724.38
  4. Step 4: Simplify right side
    1,097.22x = 1,097,174.92
  5. Step 5: Solve for x
    x = 1,097,174.92/1,097.22
  6. Step 6: Final answer
    x = 999.96

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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.