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Finding the Fourth Proportional to 676.77, 1,010.31 and 628.59

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Solution

The fourth proportional to 676.77, 1,010.31 and 628.59 is: 938.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.77 : 1,010.31 = 628.59 : x
  2. Step 2: Convert to fraction form
    676.77/1,010.31 = 628.59/x
  3. Step 3: Cross multiply
    676.77x = 1,010.31 × 628.59
  4. Step 4: Simplify right side
    676.77x = 635,072.19
  5. Step 5: Solve for x
    x = 635,072.19/676.77
  6. Step 6: Final answer
    x = 938.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.