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Finding the Fourth Proportional to 498.30, 747.19 and 189.81

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Solution

The fourth proportional to 498.30, 747.19 and 189.81 is: 284.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.30 : 747.19 = 189.81 : x
  2. Step 2: Convert to fraction form
    498.30/747.19 = 189.81/x
  3. Step 3: Cross multiply
    498.30x = 747.19 × 189.81
  4. Step 4: Simplify right side
    498.30x = 141,820.42
  5. Step 5: Solve for x
    x = 141,820.42/498.30
  6. Step 6: Final answer
    x = 284.61

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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.