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Finding the Fourth Proportional to 624.63, 935.91 and 213.54

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Solution

The fourth proportional to 624.63, 935.91 and 213.54 is: 319.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.63 : 935.91 = 213.54 : x
  2. Step 2: Convert to fraction form
    624.63/935.91 = 213.54/x
  3. Step 3: Cross multiply
    624.63x = 935.91 × 213.54
  4. Step 4: Simplify right side
    624.63x = 199,851.99
  5. Step 5: Solve for x
    x = 199,851.99/624.63
  6. Step 6: Final answer
    x = 319.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.