Home / 2,781.19-4,166.11-1,315.90

Finding the Fourth Proportional to 2,781.19, 4,166.11 and 1,315.90

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Solution

The fourth proportional to 2,781.19, 4,166.11 and 1,315.90 is: 1,971.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.19 : 4,166.11 = 1,315.90 : x
  2. Step 2: Convert to fraction form
    2,781.19/4,166.11 = 1,315.90/x
  3. Step 3: Cross multiply
    2,781.19x = 4,166.11 × 1,315.90
  4. Step 4: Simplify right side
    2,781.19x = 5,482,184.15
  5. Step 5: Solve for x
    x = 5,482,184.15/2,781.19
  6. Step 6: Final answer
    x = 1,971.16

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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.