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Finding the Fourth Proportional to 2,491.70, 3,737.66 and 931.55

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Solution

The fourth proportional to 2,491.70, 3,737.66 and 931.55 is: 1,397.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.70 : 3,737.66 = 931.55 : x
  2. Step 2: Convert to fraction form
    2,491.70/3,737.66 = 931.55/x
  3. Step 3: Cross multiply
    2,491.70x = 3,737.66 × 931.55
  4. Step 4: Simplify right side
    2,491.70x = 3,481,793.83
  5. Step 5: Solve for x
    x = 3,481,793.83/2,491.70
  6. Step 6: Final answer
    x = 1,397.36

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1.5x scale

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.