Home / 1,543.52-2,319.60-918.90

Finding the Fourth Proportional to 1,543.52, 2,319.60 and 918.90

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Solution

The fourth proportional to 1,543.52, 2,319.60 and 918.90 is: 1,380.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.52 : 2,319.60 = 918.90 : x
  2. Step 2: Convert to fraction form
    1,543.52/2,319.60 = 918.90/x
  3. Step 3: Cross multiply
    1,543.52x = 2,319.60 × 918.90
  4. Step 4: Simplify right side
    1,543.52x = 2,131,480.44
  5. Step 5: Solve for x
    x = 2,131,480.44/1,543.52
  6. Step 6: Final answer
    x = 1,380.93

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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.