Home / 2,861.18-4,291.85-913.39

Finding the Fourth Proportional to 2,861.18, 4,291.85 and 913.39

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Solution

The fourth proportional to 2,861.18, 4,291.85 and 913.39 is: 1,370.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.18 : 4,291.85 = 913.39 : x
  2. Step 2: Convert to fraction form
    2,861.18/4,291.85 = 913.39/x
  3. Step 3: Cross multiply
    2,861.18x = 4,291.85 × 913.39
  4. Step 4: Simplify right side
    2,861.18x = 3,920,132.87
  5. Step 5: Solve for x
    x = 3,920,132.87/2,861.18
  6. Step 6: Final answer
    x = 1,370.11

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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.