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Finding the Fourth Proportional to 1,171.06, 1,752.77 and 862.79

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Solution

The fourth proportional to 1,171.06, 1,752.77 and 862.79 is: 1,291.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.06 : 1,752.77 = 862.79 : x
  2. Step 2: Convert to fraction form
    1,171.06/1,752.77 = 862.79/x
  3. Step 3: Cross multiply
    1,171.06x = 1,752.77 × 862.79
  4. Step 4: Simplify right side
    1,171.06x = 1,512,265.82
  5. Step 5: Solve for x
    x = 1,512,265.82/1,171.06
  6. Step 6: Final answer
    x = 1,291.37

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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.