Home / 2,282.20-3,423.50-638.76

Finding the Fourth Proportional to 2,282.20, 3,423.50 and 638.76

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Solution

The fourth proportional to 2,282.20, 3,423.50 and 638.76 is: 958.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,282.20 : 3,423.50 = 638.76 : x
  2. Step 2: Convert to fraction form
    2,282.20/3,423.50 = 638.76/x
  3. Step 3: Cross multiply
    2,282.20x = 3,423.50 × 638.76
  4. Step 4: Simplify right side
    2,282.20x = 2,186,806.90
  5. Step 5: Solve for x
    x = 2,186,806.90/2,282.20
  6. Step 6: Final answer
    x = 958.20

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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.