Home / 1,521.22-2,281.05-698.78

Finding the Fourth Proportional to 1,521.22, 2,281.05 and 698.78

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Solution

The fourth proportional to 1,521.22, 2,281.05 and 698.78 is: 1,047.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.22 : 2,281.05 = 698.78 : x
  2. Step 2: Convert to fraction form
    1,521.22/2,281.05 = 698.78/x
  3. Step 3: Cross multiply
    1,521.22x = 2,281.05 × 698.78
  4. Step 4: Simplify right side
    1,521.22x = 1,593,952.12
  5. Step 5: Solve for x
    x = 1,593,952.12/1,521.22
  6. Step 6: Final answer
    x = 1,047.81

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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.