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Finding the Fourth Proportional to 787.58, 1,175.39 and 755.79

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Solution

The fourth proportional to 787.58, 1,175.39 and 755.79 is: 1,127.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.58 : 1,175.39 = 755.79 : x
  2. Step 2: Convert to fraction form
    787.58/1,175.39 = 755.79/x
  3. Step 3: Cross multiply
    787.58x = 1,175.39 × 755.79
  4. Step 4: Simplify right side
    787.58x = 888,348.01
  5. Step 5: Solve for x
    x = 888,348.01/787.58
  6. Step 6: Final answer
    x = 1,127.95

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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.