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Finding the Fourth Proportional to 481.64, 718.98 and 423.26

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Solution

The fourth proportional to 481.64, 718.98 and 423.26 is: 631.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.64 : 718.98 = 423.26 : x
  2. Step 2: Convert to fraction form
    481.64/718.98 = 423.26/x
  3. Step 3: Cross multiply
    481.64x = 718.98 × 423.26
  4. Step 4: Simplify right side
    481.64x = 304,310.29
  5. Step 5: Solve for x
    x = 304,310.29/481.64
  6. Step 6: Final answer
    x = 631.82

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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.