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Finding the Fourth Proportional to 498.95, 747.48 and 281.87

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Solution

The fourth proportional to 498.95, 747.48 and 281.87 is: 422.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.95 : 747.48 = 281.87 : x
  2. Step 2: Convert to fraction form
    498.95/747.48 = 281.87/x
  3. Step 3: Cross multiply
    498.95x = 747.48 × 281.87
  4. Step 4: Simplify right side
    498.95x = 210,692.19
  5. Step 5: Solve for x
    x = 210,692.19/498.95
  6. Step 6: Final answer
    x = 422.27

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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.