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Finding the Fourth Proportional to 1,422.64, 1,963.26 and 793.15

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Solution

The fourth proportional to 1,422.64, 1,963.26 and 793.15 is: 1,094.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.64 : 1,963.26 = 793.15 : x
  2. Step 2: Convert to fraction form
    1,422.64/1,963.26 = 793.15/x
  3. Step 3: Cross multiply
    1,422.64x = 1,963.26 × 793.15
  4. Step 4: Simplify right side
    1,422.64x = 1,557,159.67
  5. Step 5: Solve for x
    x = 1,557,159.67/1,422.64
  6. Step 6: Final answer
    x = 1,094.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.