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Finding the Fourth Proportional to 2,261.71, 3,392.21 and 618.38

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Solution

The fourth proportional to 2,261.71, 3,392.21 and 618.38 is: 927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.71 : 3,392.21 = 618.38 : x
  2. Step 2: Convert to fraction form
    2,261.71/3,392.21 = 618.38/x
  3. Step 3: Cross multiply
    2,261.71x = 3,392.21 × 618.38
  4. Step 4: Simplify right side
    2,261.71x = 2,097,671.73
  5. Step 5: Solve for x
    x = 2,097,671.73/2,261.71
  6. Step 6: Final answer
    x = 927.47

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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.