Home / 2,456.20-3,684.60-812.30

Finding the Fourth Proportional to 2,456.20, 3,684.60 and 812.30

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Solution

The fourth proportional to 2,456.20, 3,684.60 and 812.30 is: 1,218.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,456.20 : 3,684.60 = 812.30 : x
  2. Step 2: Convert to fraction form
    2,456.20/3,684.60 = 812.30/x
  3. Step 3: Cross multiply
    2,456.20x = 3,684.60 × 812.30
  4. Step 4: Simplify right side
    2,456.20x = 2,993,000.58
  5. Step 5: Solve for x
    x = 2,993,000.58/2,456.20
  6. Step 6: Final answer
    x = 1,218.55

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1.5x scale

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.