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Finding the Third Proportional to 556.13 and 847.31

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Solution

The third proportional to 556.13 and 847.31 is: 1,290.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.13 : 847.31 = 847.31 : x
  2. Step 2: Convert to fraction form
    556.13/847.31 = 847.31/x
  3. Step 3: Cross multiply
    556.13x = 847.31 × 847.31
  4. Step 4: Simplify right side
    556.13x = 717,938.47
  5. Step 5: Solve for x
    x = 717,938.47/556.13
  6. Step 6: Final answer
    x = 1,290.97

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.