Home / 2,078.12-3,117.13-617.15

Finding the Fourth Proportional to 2,078.12, 3,117.13 and 617.15

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Solution

The fourth proportional to 2,078.12, 3,117.13 and 617.15 is: 925.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.12 : 3,117.13 = 617.15 : x
  2. Step 2: Convert to fraction form
    2,078.12/3,117.13 = 617.15/x
  3. Step 3: Cross multiply
    2,078.12x = 3,117.13 × 617.15
  4. Step 4: Simplify right side
    2,078.12x = 1,923,743.03
  5. Step 5: Solve for x
    x = 1,923,743.03/2,078.12
  6. Step 6: Final answer
    x = 925.71

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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.