Home / 1,122.30-1,682.19-545.58

Finding the Fourth Proportional to 1,122.30, 1,682.19 and 545.58

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Solution

The fourth proportional to 1,122.30, 1,682.19 and 545.58 is: 817.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.30 : 1,682.19 = 545.58 : x
  2. Step 2: Convert to fraction form
    1,122.30/1,682.19 = 545.58/x
  3. Step 3: Cross multiply
    1,122.30x = 1,682.19 × 545.58
  4. Step 4: Simplify right side
    1,122.30x = 917,769.22
  5. Step 5: Solve for x
    x = 917,769.22/1,122.30
  6. Step 6: Final answer
    x = 817.76

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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.