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Finding the Fourth Proportional to 998.70, 1,377.32 and 605.04

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Solution

The fourth proportional to 998.70, 1,377.32 and 605.04 is: 834.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.70 : 1,377.32 = 605.04 : x
  2. Step 2: Convert to fraction form
    998.70/1,377.32 = 605.04/x
  3. Step 3: Cross multiply
    998.70x = 1,377.32 × 605.04
  4. Step 4: Simplify right side
    998.70x = 833,330.67
  5. Step 5: Solve for x
    x = 833,330.67/998.70
  6. Step 6: Final answer
    x = 834.42

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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.