Home / 2,281.18-3,422.88-820.45

Finding the Fourth Proportional to 2,281.18, 3,422.88 and 820.45

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Solution

The fourth proportional to 2,281.18, 3,422.88 and 820.45 is: 1,231.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,281.18 : 3,422.88 = 820.45 : x
  2. Step 2: Convert to fraction form
    2,281.18/3,422.88 = 820.45/x
  3. Step 3: Cross multiply
    2,281.18x = 3,422.88 × 820.45
  4. Step 4: Simplify right side
    2,281.18x = 2,808,301.90
  5. Step 5: Solve for x
    x = 2,808,301.90/2,281.18
  6. Step 6: Final answer
    x = 1,231.07

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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.