Home / 2,176.18-3,000.85-1,291.81

Finding the Fourth Proportional to 2,176.18, 3,000.85 and 1,291.81

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Solution

The fourth proportional to 2,176.18, 3,000.85 and 1,291.81 is: 1,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176.18 : 3,000.85 = 1,291.81 : x
  2. Step 2: Convert to fraction form
    2,176.18/3,000.85 = 1,291.81/x
  3. Step 3: Cross multiply
    2,176.18x = 3,000.85 × 1,291.81
  4. Step 4: Simplify right side
    2,176.18x = 3,876,530.20
  5. Step 5: Solve for x
    x = 3,876,530.20/2,176.18
  6. Step 6: Final answer
    x = 1,781.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.