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Finding the Fourth Proportional to 453.47, 624.24 and 398.79

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Solution

The fourth proportional to 453.47, 624.24 and 398.79 is: 548.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.47 : 624.24 = 398.79 : x
  2. Step 2: Convert to fraction form
    453.47/624.24 = 398.79/x
  3. Step 3: Cross multiply
    453.47x = 624.24 × 398.79
  4. Step 4: Simplify right side
    453.47x = 248,940.67
  5. Step 5: Solve for x
    x = 248,940.67/453.47
  6. Step 6: Final answer
    x = 548.97

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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.