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Finding the Fourth Proportional to 498.80, 747.72 and 279.53

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Solution

The fourth proportional to 498.80, 747.72 and 279.53 is: 419.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.80 : 747.72 = 279.53 : x
  2. Step 2: Convert to fraction form
    498.80/747.72 = 279.53/x
  3. Step 3: Cross multiply
    498.80x = 747.72 × 279.53
  4. Step 4: Simplify right side
    498.80x = 209,010.64
  5. Step 5: Solve for x
    x = 209,010.64/498.80
  6. Step 6: Final answer
    x = 419.03

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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.