Home / 2,425.40-3,638.10-1,109.15

Finding the Fourth Proportional to 2,425.40, 3,638.10 and 1,109.15

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Solution

The fourth proportional to 2,425.40, 3,638.10 and 1,109.15 is: 1,663.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,425.40 : 3,638.10 = 1,109.15 : x
  2. Step 2: Convert to fraction form
    2,425.40/3,638.10 = 1,109.15/x
  3. Step 3: Cross multiply
    2,425.40x = 3,638.10 × 1,109.15
  4. Step 4: Simplify right side
    2,425.40x = 4,035,198.62
  5. Step 5: Solve for x
    x = 4,035,198.62/2,425.40
  6. Step 6: Final answer
    x = 1,663.73

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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.