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Finding the Fourth Proportional to 623.91, 935.55 and 212.97

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Solution

The fourth proportional to 623.91, 935.55 and 212.97 is: 319.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.91 : 935.55 = 212.97 : x
  2. Step 2: Convert to fraction form
    623.91/935.55 = 212.97/x
  3. Step 3: Cross multiply
    623.91x = 935.55 × 212.97
  4. Step 4: Simplify right side
    623.91x = 199,244.08
  5. Step 5: Solve for x
    x = 199,244.08/623.91
  6. Step 6: Final answer
    x = 319.35

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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.