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Finding the Fourth Proportional to 998.01, 1,377 and 624.84

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Solution

The fourth proportional to 998.01, 1,377 and 624.84 is: 862.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.01 : 1,377 = 624.84 : x
  2. Step 2: Convert to fraction form
    998.01/1,377 = 624.84/x
  3. Step 3: Cross multiply
    998.01x = 1,377 × 624.84
  4. Step 4: Simplify right side
    998.01x = 860,404.68
  5. Step 5: Solve for x
    x = 860,404.68/998.01
  6. Step 6: Final answer
    x = 862.12

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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.