Home / 1,014.20-1,521.30-649.70

Finding the Fourth Proportional to 1,014.20, 1,521.30 and 649.70

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Solution

The fourth proportional to 1,014.20, 1,521.30 and 649.70 is: 974.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.20 : 1,521.30 = 649.70 : x
  2. Step 2: Convert to fraction form
    1,014.20/1,521.30 = 649.70/x
  3. Step 3: Cross multiply
    1,014.20x = 1,521.30 × 649.70
  4. Step 4: Simplify right side
    1,014.20x = 988,388.61
  5. Step 5: Solve for x
    x = 988,388.61/1,014.20
  6. Step 6: Final answer
    x = 974.55

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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.