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Finding the Fourth Proportional to 623.22, 934.62 and 212.28

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Solution

The fourth proportional to 623.22, 934.62 and 212.28 is: 318.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.22 : 934.62 = 212.28 : x
  2. Step 2: Convert to fraction form
    623.22/934.62 = 212.28/x
  3. Step 3: Cross multiply
    623.22x = 934.62 × 212.28
  4. Step 4: Simplify right side
    623.22x = 198,401.13
  5. Step 5: Solve for x
    x = 198,401.13/623.22
  6. Step 6: Final answer
    x = 318.35

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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.