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Finding the Fourth Proportional to 756.18, 1,128.63 and 737.72

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Solution

The fourth proportional to 756.18, 1,128.63 and 737.72 is: 1,101.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.18 : 1,128.63 = 737.72 : x
  2. Step 2: Convert to fraction form
    756.18/1,128.63 = 737.72/x
  3. Step 3: Cross multiply
    756.18x = 1,128.63 × 737.72
  4. Step 4: Simplify right side
    756.18x = 832,607.28
  5. Step 5: Solve for x
    x = 832,607.28/756.18
  6. Step 6: Final answer
    x = 1,101.07

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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.