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Finding the Fourth Proportional to 498.98, 750.18 and 408.34

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Solution

The fourth proportional to 498.98, 750.18 and 408.34 is: 613.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.98 : 750.18 = 408.34 : x
  2. Step 2: Convert to fraction form
    498.98/750.18 = 408.34/x
  3. Step 3: Cross multiply
    498.98x = 750.18 × 408.34
  4. Step 4: Simplify right side
    498.98x = 306,328.50
  5. Step 5: Solve for x
    x = 306,328.50/498.98
  6. Step 6: Final answer
    x = 613.91

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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.