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Finding the Fourth Proportional to 998.06, 1,377.34 and 556.00

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Solution

The fourth proportional to 998.06, 1,377.34 and 556.00 is: 767.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.06 : 1,377.34 = 556.00 : x
  2. Step 2: Convert to fraction form
    998.06/1,377.34 = 556.00/x
  3. Step 3: Cross multiply
    998.06x = 1,377.34 × 556.00
  4. Step 4: Simplify right side
    998.06x = 765,796.21
  5. Step 5: Solve for x
    x = 765,796.21/998.06
  6. Step 6: Final answer
    x = 767.29

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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.