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Finding the Fourth Proportional to 498.20, 746.15 and 480.90

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Solution

The fourth proportional to 498.20, 746.15 and 480.90 is: 720.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.20 : 746.15 = 480.90 : x
  2. Step 2: Convert to fraction form
    498.20/746.15 = 480.90/x
  3. Step 3: Cross multiply
    498.20x = 746.15 × 480.90
  4. Step 4: Simplify right side
    498.20x = 358,821.13
  5. Step 5: Solve for x
    x = 358,821.13/498.20
  6. Step 6: Final answer
    x = 720.23

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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.