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Finding the Fourth Proportional to 761.88, 1,136.82 and 715.44

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Solution

The fourth proportional to 761.88, 1,136.82 and 715.44 is: 1,067.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.88 : 1,136.82 = 715.44 : x
  2. Step 2: Convert to fraction form
    761.88/1,136.82 = 715.44/x
  3. Step 3: Cross multiply
    761.88x = 1,136.82 × 715.44
  4. Step 4: Simplify right side
    761.88x = 813,326.50
  5. Step 5: Solve for x
    x = 813,326.50/761.88
  6. Step 6: Final answer
    x = 1,067.53

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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.