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Finding the Fourth Proportional to 676.01, 1,013.67 and 647.62

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Solution

The fourth proportional to 676.01, 1,013.67 and 647.62 is: 971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.01 : 1,013.67 = 647.62 : x
  2. Step 2: Convert to fraction form
    676.01/1,013.67 = 647.62/x
  3. Step 3: Cross multiply
    676.01x = 1,013.67 × 647.62
  4. Step 4: Simplify right side
    676.01x = 656,472.97
  5. Step 5: Solve for x
    x = 656,472.97/676.01
  6. Step 6: Final answer
    x = 971.10

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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.