Home / 2,655.20-3,982.80-1,618.40

Finding the Fourth Proportional to 2,655.20, 3,982.80 and 1,618.40

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Solution

The fourth proportional to 2,655.20, 3,982.80 and 1,618.40 is: 2,427.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.20 : 3,982.80 = 1,618.40 : x
  2. Step 2: Convert to fraction form
    2,655.20/3,982.80 = 1,618.40/x
  3. Step 3: Cross multiply
    2,655.20x = 3,982.80 × 1,618.40
  4. Step 4: Simplify right side
    2,655.20x = 6,445,763.52
  5. Step 5: Solve for x
    x = 6,445,763.52/2,655.20
  6. Step 6: Final answer
    x = 2,427.60

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Similar ratio
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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.