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Finding the Fourth Proportional to 2,261.62, 3,392.16 and 618.31

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Solution

The fourth proportional to 2,261.62, 3,392.16 and 618.31 is: 927.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.62 : 3,392.16 = 618.31 : x
  2. Step 2: Convert to fraction form
    2,261.62/3,392.16 = 618.31/x
  3. Step 3: Cross multiply
    2,261.62x = 3,392.16 × 618.31
  4. Step 4: Simplify right side
    2,261.62x = 2,097,406.45
  5. Step 5: Solve for x
    x = 2,097,406.45/2,261.62
  6. Step 6: Final answer
    x = 927.39

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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.