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Finding the Fourth Proportional to 1,179.56, 1,627.80 and 655.70

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Solution

The fourth proportional to 1,179.56, 1,627.80 and 655.70 is: 904.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.56 : 1,627.80 = 655.70 : x
  2. Step 2: Convert to fraction form
    1,179.56/1,627.80 = 655.70/x
  3. Step 3: Cross multiply
    1,179.56x = 1,627.80 × 655.70
  4. Step 4: Simplify right side
    1,179.56x = 1,067,337.86
  5. Step 5: Solve for x
    x = 1,067,337.86/1,179.56
  6. Step 6: Final answer
    x = 904.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.