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Finding the Fourth Proportional to 755.42, 1,042.48 and 423.86

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Solution

The fourth proportional to 755.42, 1,042.48 and 423.86 is: 584.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.42 : 1,042.48 = 423.86 : x
  2. Step 2: Convert to fraction form
    755.42/1,042.48 = 423.86/x
  3. Step 3: Cross multiply
    755.42x = 1,042.48 × 423.86
  4. Step 4: Simplify right side
    755.42x = 441,865.57
  5. Step 5: Solve for x
    x = 441,865.57/755.42
  6. Step 6: Final answer
    x = 584.93

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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.