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Finding the Fourth Proportional to 1,097.20, 1,514.08 and 631.44

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Solution

The fourth proportional to 1,097.20, 1,514.08 and 631.44 is: 871.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.20 : 1,514.08 = 631.44 : x
  2. Step 2: Convert to fraction form
    1,097.20/1,514.08 = 631.44/x
  3. Step 3: Cross multiply
    1,097.20x = 1,514.08 × 631.44
  4. Step 4: Simplify right side
    1,097.20x = 956,050.68
  5. Step 5: Solve for x
    x = 956,050.68/1,097.20
  6. Step 6: Final answer
    x = 871.35

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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.