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Finding the Fourth Proportional to 755,540.64, 1,042,648.56 and 411,380.64

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Solution

The fourth proportional to 755,540.64, 1,042,648.56 and 411,380.64 is: 567,706.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    755,540.64 : 1,042,648.56 = 411,380.64 : x
  2. Step 2: Convert to fraction form
    755,540.64/1,042,648.56 = 411,380.64/x
  3. Step 3: Cross multiply
    755,540.64x = 1,042,648.56 × 411,380.64
  4. Step 4: Simplify right side
    755,540.64x = 428,925,431,907.88
  5. Step 5: Solve for x
    x = 428,925,431,907.88/755,540.64
  6. Step 6: Final answer
    x = 567,706.63

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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.