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Finding the Fourth Proportional to 754.98, 1,042.49 and 475.67

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Solution

The fourth proportional to 754.98, 1,042.49 and 475.67 is: 656.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.98 : 1,042.49 = 475.67 : x
  2. Step 2: Convert to fraction form
    754.98/1,042.49 = 475.67/x
  3. Step 3: Cross multiply
    754.98x = 1,042.49 × 475.67
  4. Step 4: Simplify right side
    754.98x = 495,877.20
  5. Step 5: Solve for x
    x = 495,877.20/754.98
  6. Step 6: Final answer
    x = 656.81

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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.