Home / 1,012.20-1,518.30-667.74

Finding the Fourth Proportional to 1,012.20, 1,518.30 and 667.74

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Solution

The fourth proportional to 1,012.20, 1,518.30 and 667.74 is: 1,001.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.20 : 1,518.30 = 667.74 : x
  2. Step 2: Convert to fraction form
    1,012.20/1,518.30 = 667.74/x
  3. Step 3: Cross multiply
    1,012.20x = 1,518.30 × 667.74
  4. Step 4: Simplify right side
    1,012.20x = 1,013,829.64
  5. Step 5: Solve for x
    x = 1,013,829.64/1,012.20
  6. Step 6: Final answer
    x = 1,001.61

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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.