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Finding the Fourth Proportional to 1,016.62, 1,525.20 and 621.75

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Solution

The fourth proportional to 1,016.62, 1,525.20 and 621.75 is: 932.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,016.62 : 1,525.20 = 621.75 : x
  2. Step 2: Convert to fraction form
    1,016.62/1,525.20 = 621.75/x
  3. Step 3: Cross multiply
    1,016.62x = 1,525.20 × 621.75
  4. Step 4: Simplify right side
    1,016.62x = 948,282.37
  5. Step 5: Solve for x
    x = 948,282.37/1,016.62
  6. Step 6: Final answer
    x = 932.78

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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.