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Finding the Fourth Proportional to 1,078.62, 1,617.20 and 501.18

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Solution

The fourth proportional to 1,078.62, 1,617.20 and 501.18 is: 751.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.62 : 1,617.20 = 501.18 : x
  2. Step 2: Convert to fraction form
    1,078.62/1,617.20 = 501.18/x
  3. Step 3: Cross multiply
    1,078.62x = 1,617.20 × 501.18
  4. Step 4: Simplify right side
    1,078.62x = 810,508.30
  5. Step 5: Solve for x
    x = 810,508.30/1,078.62
  6. Step 6: Final answer
    x = 751.43

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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.