Home / 1,635.60-2,449.80-985.20

Finding the Fourth Proportional to 1,635.60, 2,449.80 and 985.20

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Solution

The fourth proportional to 1,635.60, 2,449.80 and 985.20 is: 1,475.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.60 : 2,449.80 = 985.20 : x
  2. Step 2: Convert to fraction form
    1,635.60/2,449.80 = 985.20/x
  3. Step 3: Cross multiply
    1,635.60x = 2,449.80 × 985.20
  4. Step 4: Simplify right side
    1,635.60x = 2,413,542.96
  5. Step 5: Solve for x
    x = 2,413,542.96/1,635.60
  6. Step 6: Final answer
    x = 1,475.63

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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.