Home / 1,381.32-2,069.16-1,149.47

Finding the Fourth Proportional to 1,381.32, 2,069.16 and 1,149.47

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Solution

The fourth proportional to 1,381.32, 2,069.16 and 1,149.47 is: 1,721.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.32 : 2,069.16 = 1,149.47 : x
  2. Step 2: Convert to fraction form
    1,381.32/2,069.16 = 1,149.47/x
  3. Step 3: Cross multiply
    1,381.32x = 2,069.16 × 1,149.47
  4. Step 4: Simplify right side
    1,381.32x = 2,378,437.35
  5. Step 5: Solve for x
    x = 2,378,437.35/1,381.32
  6. Step 6: Final answer
    x = 1,721.86

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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.