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Finding the Fourth Proportional to 623.45, 935.10 and 212.51

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Solution

The fourth proportional to 623.45, 935.10 and 212.51 is: 318.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.45 : 935.10 = 212.51 : x
  2. Step 2: Convert to fraction form
    623.45/935.10 = 212.51/x
  3. Step 3: Cross multiply
    623.45x = 935.10 × 212.51
  4. Step 4: Simplify right side
    623.45x = 198,713.43
  5. Step 5: Solve for x
    x = 198,713.43/623.45
  6. Step 6: Final answer
    x = 318.73

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Similar ratio
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1.5x scale

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.