Home / 2,474.20-3,710.40-830.80

Finding the Fourth Proportional to 2,474.20, 3,710.40 and 830.80

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Solution

The fourth proportional to 2,474.20, 3,710.40 and 830.80 is: 1,245.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,474.20 : 3,710.40 = 830.80 : x
  2. Step 2: Convert to fraction form
    2,474.20/3,710.40 = 830.80/x
  3. Step 3: Cross multiply
    2,474.20x = 3,710.40 × 830.80
  4. Step 4: Simplify right side
    2,474.20x = 3,082,600.32
  5. Step 5: Solve for x
    x = 3,082,600.32/2,474.20
  6. Step 6: Final answer
    x = 1,245.90

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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.