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Finding the Fourth Proportional to 1,357.08, 2,034.99 and 663.78

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Solution

The fourth proportional to 1,357.08, 2,034.99 and 663.78 is: 995.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.08 : 2,034.99 = 663.78 : x
  2. Step 2: Convert to fraction form
    1,357.08/2,034.99 = 663.78/x
  3. Step 3: Cross multiply
    1,357.08x = 2,034.99 × 663.78
  4. Step 4: Simplify right side
    1,357.08x = 1,350,785.66
  5. Step 5: Solve for x
    x = 1,350,785.66/1,357.08
  6. Step 6: Final answer
    x = 995.36

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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.