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Finding the Fourth Proportional to 1,177.50, 1,767.69 and 664.86

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Solution

The fourth proportional to 1,177.50, 1,767.69 and 664.86 is: 998.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.50 : 1,767.69 = 664.86 : x
  2. Step 2: Convert to fraction form
    1,177.50/1,767.69 = 664.86/x
  3. Step 3: Cross multiply
    1,177.50x = 1,767.69 × 664.86
  4. Step 4: Simplify right side
    1,177.50x = 1,175,266.37
  5. Step 5: Solve for x
    x = 1,175,266.37/1,177.50
  6. Step 6: Final answer
    x = 998.10

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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.