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Finding the Fourth Proportional to 1,177.65, 1,765.17 and 904.86

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Solution

The fourth proportional to 1,177.65, 1,765.17 and 904.86 is: 1,356.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.65 : 1,765.17 = 904.86 : x
  2. Step 2: Convert to fraction form
    1,177.65/1,765.17 = 904.86/x
  3. Step 3: Cross multiply
    1,177.65x = 1,765.17 × 904.86
  4. Step 4: Simplify right side
    1,177.65x = 1,597,231.73
  5. Step 5: Solve for x
    x = 1,597,231.73/1,177.65
  6. Step 6: Final answer
    x = 1,356.29

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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.