Home / 2,431.40-3,641.70-1,275.80

Finding the Fourth Proportional to 2,431.40, 3,641.70 and 1,275.80

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Solution

The fourth proportional to 2,431.40, 3,641.70 and 1,275.80 is: 1,910.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.40 : 3,641.70 = 1,275.80 : x
  2. Step 2: Convert to fraction form
    2,431.40/3,641.70 = 1,275.80/x
  3. Step 3: Cross multiply
    2,431.40x = 3,641.70 × 1,275.80
  4. Step 4: Simplify right side
    2,431.40x = 4,646,080.86
  5. Step 5: Solve for x
    x = 4,646,080.86/2,431.40
  6. Step 6: Final answer
    x = 1,910.87

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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.