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Finding the Fourth Proportional to 498.98, 748.65 and 191.05

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Solution

The fourth proportional to 498.98, 748.65 and 191.05 is: 286.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.98 : 748.65 = 191.05 : x
  2. Step 2: Convert to fraction form
    498.98/748.65 = 191.05/x
  3. Step 3: Cross multiply
    498.98x = 748.65 × 191.05
  4. Step 4: Simplify right side
    498.98x = 143,029.58
  5. Step 5: Solve for x
    x = 143,029.58/498.98
  6. Step 6: Final answer
    x = 286.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.