Home / 1,248.26-1,871.51-1,123.70

Finding the Fourth Proportional to 1,248.26, 1,871.51 and 1,123.70

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Solution

The fourth proportional to 1,248.26, 1,871.51 and 1,123.70 is: 1,684.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.26 : 1,871.51 = 1,123.70 : x
  2. Step 2: Convert to fraction form
    1,248.26/1,871.51 = 1,123.70/x
  3. Step 3: Cross multiply
    1,248.26x = 1,871.51 × 1,123.70
  4. Step 4: Simplify right side
    1,248.26x = 2,103,000.81
  5. Step 5: Solve for x
    x = 2,103,000.81/1,248.26
  6. Step 6: Final answer
    x = 1,684.75

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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.