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Finding the Fourth Proportional to 756.18, 1,136.40 and 737.76

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Solution

The fourth proportional to 756.18, 1,136.40 and 737.76 is: 1,108.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.18 : 1,136.40 = 737.76 : x
  2. Step 2: Convert to fraction form
    756.18/1,136.40 = 737.76/x
  3. Step 3: Cross multiply
    756.18x = 1,136.40 × 737.76
  4. Step 4: Simplify right side
    756.18x = 838,390.46
  5. Step 5: Solve for x
    x = 838,390.46/756.18
  6. Step 6: Final answer
    x = 1,108.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.