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Finding the Fourth Proportional to 418.42, 624.01 and 357.10

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Solution

The fourth proportional to 418.42, 624.01 and 357.10 is: 532.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.42 : 624.01 = 357.10 : x
  2. Step 2: Convert to fraction form
    418.42/624.01 = 357.10/x
  3. Step 3: Cross multiply
    418.42x = 624.01 × 357.10
  4. Step 4: Simplify right side
    418.42x = 222,833.97
  5. Step 5: Solve for x
    x = 222,833.97/418.42
  6. Step 6: Final answer
    x = 532.56

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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.