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Finding the Fourth Proportional to 755.96, 1,042.07 and 615.56

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Solution

The fourth proportional to 755.96, 1,042.07 and 615.56 is: 848.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.96 : 1,042.07 = 615.56 : x
  2. Step 2: Convert to fraction form
    755.96/1,042.07 = 615.56/x
  3. Step 3: Cross multiply
    755.96x = 1,042.07 × 615.56
  4. Step 4: Simplify right side
    755.96x = 641,448.32
  5. Step 5: Solve for x
    x = 641,448.32/755.96
  6. Step 6: Final answer
    x = 848.53

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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.