Home / 1,118.32-1,543.14-620.96

Finding the Fourth Proportional to 1,118.32, 1,543.14 and 620.96

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Solution

The fourth proportional to 1,118.32, 1,543.14 and 620.96 is: 856.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.32 : 1,543.14 = 620.96 : x
  2. Step 2: Convert to fraction form
    1,118.32/1,543.14 = 620.96/x
  3. Step 3: Cross multiply
    1,118.32x = 1,543.14 × 620.96
  4. Step 4: Simplify right side
    1,118.32x = 958,228.21
  5. Step 5: Solve for x
    x = 958,228.21/1,118.32
  6. Step 6: Final answer
    x = 856.85

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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.