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Finding the Fourth Proportional to 737.77, 1,106.93 and 391.12

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Solution

The fourth proportional to 737.77, 1,106.93 and 391.12 is: 586.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.77 : 1,106.93 = 391.12 : x
  2. Step 2: Convert to fraction form
    737.77/1,106.93 = 391.12/x
  3. Step 3: Cross multiply
    737.77x = 1,106.93 × 391.12
  4. Step 4: Simplify right side
    737.77x = 432,942.46
  5. Step 5: Solve for x
    x = 432,942.46/737.77
  6. Step 6: Final answer
    x = 586.83

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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.