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Finding the Fourth Proportional to 481.40, 718.35 and 426.72

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Solution

The fourth proportional to 481.40, 718.35 and 426.72 is: 636.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.40 : 718.35 = 426.72 : x
  2. Step 2: Convert to fraction form
    481.40/718.35 = 426.72/x
  3. Step 3: Cross multiply
    481.40x = 718.35 × 426.72
  4. Step 4: Simplify right side
    481.40x = 306,532.18
  5. Step 5: Solve for x
    x = 306,532.18/481.40
  6. Step 6: Final answer
    x = 636.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.