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Finding the Fourth Proportional to 715.38, 1,067.29 and 637.47

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Solution

The fourth proportional to 715.38, 1,067.29 and 637.47 is: 951.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.38 : 1,067.29 = 637.47 : x
  2. Step 2: Convert to fraction form
    715.38/1,067.29 = 637.47/x
  3. Step 3: Cross multiply
    715.38x = 1,067.29 × 637.47
  4. Step 4: Simplify right side
    715.38x = 680,365.36
  5. Step 5: Solve for x
    x = 680,365.36/715.38
  6. Step 6: Final answer
    x = 951.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.