Home / 1,118.22-1,543.20-620.86

Finding the Fourth Proportional to 1,118.22, 1,543.20 and 620.86

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Solution

The fourth proportional to 1,118.22, 1,543.20 and 620.86 is: 856.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.22 : 1,543.20 = 620.86 : x
  2. Step 2: Convert to fraction form
    1,118.22/1,543.20 = 620.86/x
  3. Step 3: Cross multiply
    1,118.22x = 1,543.20 × 620.86
  4. Step 4: Simplify right side
    1,118.22x = 958,104.97
  5. Step 5: Solve for x
    x = 958,104.97/1,118.22
  6. Step 6: Final answer
    x = 856.81

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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.