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Finding the Fourth Proportional to 676.18, 1,013.82 and 432.88

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Solution

The fourth proportional to 676.18, 1,013.82 and 432.88 is: 649.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.18 : 1,013.82 = 432.88 : x
  2. Step 2: Convert to fraction form
    676.18/1,013.82 = 432.88/x
  3. Step 3: Cross multiply
    676.18x = 1,013.82 × 432.88
  4. Step 4: Simplify right side
    676.18x = 438,858.24
  5. Step 5: Solve for x
    x = 438,858.24/676.18
  6. Step 6: Final answer
    x = 649.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.