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Finding the Fourth Proportional to 453.68, 624.66 and 398.08

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Solution

The fourth proportional to 453.68, 624.66 and 398.08 is: 548.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.68 : 624.66 = 398.08 : x
  2. Step 2: Convert to fraction form
    453.68/624.66 = 398.08/x
  3. Step 3: Cross multiply
    453.68x = 624.66 × 398.08
  4. Step 4: Simplify right side
    453.68x = 248,664.65
  5. Step 5: Solve for x
    x = 248,664.65/453.68
  6. Step 6: Final answer
    x = 548.11

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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.