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Finding the Fourth Proportional to 1,167.82, 1,752.90 and 839.15

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Solution

The fourth proportional to 1,167.82, 1,752.90 and 839.15 is: 1,259.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.82 : 1,752.90 = 839.15 : x
  2. Step 2: Convert to fraction form
    1,167.82/1,752.90 = 839.15/x
  3. Step 3: Cross multiply
    1,167.82x = 1,752.90 × 839.15
  4. Step 4: Simplify right side
    1,167.82x = 1,470,944.13
  5. Step 5: Solve for x
    x = 1,470,944.13/1,167.82
  6. Step 6: Final answer
    x = 1,259.56

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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.