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Finding the Fourth Proportional to 2,261.87, 3,392.29 and 618.55

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Solution

The fourth proportional to 2,261.87, 3,392.29 and 618.55 is: 927.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.87 : 3,392.29 = 618.55 : x
  2. Step 2: Convert to fraction form
    2,261.87/3,392.29 = 618.55/x
  3. Step 3: Cross multiply
    2,261.87x = 3,392.29 × 618.55
  4. Step 4: Simplify right side
    2,261.87x = 2,098,300.98
  5. Step 5: Solve for x
    x = 2,098,300.98/2,261.87
  6. Step 6: Final answer
    x = 927.68

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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.