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Finding the Fourth Proportional to 498.55, 748.05 and 490.35

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Solution

The fourth proportional to 498.55, 748.05 and 490.35 is: 735.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.55 : 748.05 = 490.35 : x
  2. Step 2: Convert to fraction form
    498.55/748.05 = 490.35/x
  3. Step 3: Cross multiply
    498.55x = 748.05 × 490.35
  4. Step 4: Simplify right side
    498.55x = 366,808.16
  5. Step 5: Solve for x
    x = 366,808.16/498.55
  6. Step 6: Final answer
    x = 735.75

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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.