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Finding the Fourth Proportional to 1,357.56, 2,034.84 and 663.72

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Solution

The fourth proportional to 1,357.56, 2,034.84 and 663.72 is: 994.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.56 : 2,034.84 = 663.72 : x
  2. Step 2: Convert to fraction form
    1,357.56/2,034.84 = 663.72/x
  3. Step 3: Cross multiply
    1,357.56x = 2,034.84 × 663.72
  4. Step 4: Simplify right side
    1,357.56x = 1,350,564.00
  5. Step 5: Solve for x
    x = 1,350,564.00/1,357.56
  6. Step 6: Final answer
    x = 994.85

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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.