Home / 1,543.12-2,129.76-1,449.40

Finding the Fourth Proportional to 1,543.12, 2,129.76 and 1,449.40

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Solution

The fourth proportional to 1,543.12, 2,129.76 and 1,449.40 is: 2,000.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.12 : 2,129.76 = 1,449.40 : x
  2. Step 2: Convert to fraction form
    1,543.12/2,129.76 = 1,449.40/x
  3. Step 3: Cross multiply
    1,543.12x = 2,129.76 × 1,449.40
  4. Step 4: Simplify right side
    1,543.12x = 3,086,874.14
  5. Step 5: Solve for x
    x = 3,086,874.14/1,543.12
  6. Step 6: Final answer
    x = 2,000.41

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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.