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Finding the Fourth Proportional to 457.38, 630.56 and 443.04

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Solution

The fourth proportional to 457.38, 630.56 and 443.04 is: 610.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.38 : 630.56 = 443.04 : x
  2. Step 2: Convert to fraction form
    457.38/630.56 = 443.04/x
  3. Step 3: Cross multiply
    457.38x = 630.56 × 443.04
  4. Step 4: Simplify right side
    457.38x = 279,362.05
  5. Step 5: Solve for x
    x = 279,362.05/457.38
  6. Step 6: Final answer
    x = 610.79

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.