Home / 1,439.26-1,987.08-1,123.98

Finding the Fourth Proportional to 1,439.26, 1,987.08 and 1,123.98

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Solution

The fourth proportional to 1,439.26, 1,987.08 and 1,123.98 is: 1,551.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.26 : 1,987.08 = 1,123.98 : x
  2. Step 2: Convert to fraction form
    1,439.26/1,987.08 = 1,123.98/x
  3. Step 3: Cross multiply
    1,439.26x = 1,987.08 × 1,123.98
  4. Step 4: Simplify right side
    1,439.26x = 2,233,438.18
  5. Step 5: Solve for x
    x = 2,233,438.18/1,439.26
  6. Step 6: Final answer
    x = 1,551.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.