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Finding the Fourth Proportional to 1,351.87, 2,027.52 and 621.25

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Solution

The fourth proportional to 1,351.87, 2,027.52 and 621.25 is: 931.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.87 : 2,027.52 = 621.25 : x
  2. Step 2: Convert to fraction form
    1,351.87/2,027.52 = 621.25/x
  3. Step 3: Cross multiply
    1,351.87x = 2,027.52 × 621.25
  4. Step 4: Simplify right side
    1,351.87x = 1,259,596.80
  5. Step 5: Solve for x
    x = 1,259,596.80/1,351.87
  6. Step 6: Final answer
    x = 931.74

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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.