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Finding the Fourth Proportional to 755.52, 1,127.80 and 744.58

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Solution

The fourth proportional to 755.52, 1,127.80 and 744.58 is: 1,111.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.52 : 1,127.80 = 744.58 : x
  2. Step 2: Convert to fraction form
    755.52/1,127.80 = 744.58/x
  3. Step 3: Cross multiply
    755.52x = 1,127.80 × 744.58
  4. Step 4: Simplify right side
    755.52x = 839,737.32
  5. Step 5: Solve for x
    x = 839,737.32/755.52
  6. Step 6: Final answer
    x = 1,111.47

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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.