Home / 3,985.20-5,499.63-2,306.70

Finding the Fourth Proportional to 3,985.20, 5,499.63 and 2,306.70

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Solution

The fourth proportional to 3,985.20, 5,499.63 and 2,306.70 is: 3,183.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.20 : 5,499.63 = 2,306.70 : x
  2. Step 2: Convert to fraction form
    3,985.20/5,499.63 = 2,306.70/x
  3. Step 3: Cross multiply
    3,985.20x = 5,499.63 × 2,306.70
  4. Step 4: Simplify right side
    3,985.20x = 12,685,996.52
  5. Step 5: Solve for x
    x = 12,685,996.52/3,985.20
  6. Step 6: Final answer
    x = 3,183.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.