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Finding the Fourth Proportional to 1,375.98, 2,062.32 and 553.02

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Solution

The fourth proportional to 1,375.98, 2,062.32 and 553.02 is: 828.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.98 : 2,062.32 = 553.02 : x
  2. Step 2: Convert to fraction form
    1,375.98/2,062.32 = 553.02/x
  3. Step 3: Cross multiply
    1,375.98x = 2,062.32 × 553.02
  4. Step 4: Simplify right side
    1,375.98x = 1,140,504.21
  5. Step 5: Solve for x
    x = 1,140,504.21/1,375.98
  6. Step 6: Final answer
    x = 828.87

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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.