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Finding the Fourth Proportional to 1,177.77, 1,765.57 and 528.15

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Solution

The fourth proportional to 1,177.77, 1,765.57 and 528.15 is: 791.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.77 : 1,765.57 = 528.15 : x
  2. Step 2: Convert to fraction form
    1,177.77/1,765.57 = 528.15/x
  3. Step 3: Cross multiply
    1,177.77x = 1,765.57 × 528.15
  4. Step 4: Simplify right side
    1,177.77x = 932,481.38
  5. Step 5: Solve for x
    x = 932,481.38/1,177.77
  6. Step 6: Final answer
    x = 791.74

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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.