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Finding the Fourth Proportional to 2,078.16, 3,117.39 and 617.43

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Solution

The fourth proportional to 2,078.16, 3,117.39 and 617.43 is: 926.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.16 : 3,117.39 = 617.43 : x
  2. Step 2: Convert to fraction form
    2,078.16/3,117.39 = 617.43/x
  3. Step 3: Cross multiply
    2,078.16x = 3,117.39 × 617.43
  4. Step 4: Simplify right side
    2,078.16x = 1,924,770.11
  5. Step 5: Solve for x
    x = 1,924,770.11/2,078.16
  6. Step 6: Final answer
    x = 926.19

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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.