Home / 1,543.05-2,314.17-720.90

Finding the Fourth Proportional to 1,543.05, 2,314.17 and 720.90

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Solution

The fourth proportional to 1,543.05, 2,314.17 and 720.90 is: 1,081.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.05 : 2,314.17 = 720.90 : x
  2. Step 2: Convert to fraction form
    1,543.05/2,314.17 = 720.90/x
  3. Step 3: Cross multiply
    1,543.05x = 2,314.17 × 720.90
  4. Step 4: Simplify right side
    1,543.05x = 1,668,285.15
  5. Step 5: Solve for x
    x = 1,668,285.15/1,543.05
  6. Step 6: Final answer
    x = 1,081.16

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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.