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Finding the Fourth Proportional to 998.32, 1,377.30 and 605.20

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Solution

The fourth proportional to 998.32, 1,377.30 and 605.20 is: 834.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.32 : 1,377.30 = 605.20 : x
  2. Step 2: Convert to fraction form
    998.32/1,377.30 = 605.20/x
  3. Step 3: Cross multiply
    998.32x = 1,377.30 × 605.20
  4. Step 4: Simplify right side
    998.32x = 833,535.07
  5. Step 5: Solve for x
    x = 833,535.07/998.32
  6. Step 6: Final answer
    x = 834.94

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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.