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Finding the Fourth Proportional to 623.16, 934.47 and 212.22

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Solution

The fourth proportional to 623.16, 934.47 and 212.22 is: 318.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.16 : 934.47 = 212.22 : x
  2. Step 2: Convert to fraction form
    623.16/934.47 = 212.22/x
  3. Step 3: Cross multiply
    623.16x = 934.47 × 212.22
  4. Step 4: Simplify right side
    623.16x = 198,313.22
  5. Step 5: Solve for x
    x = 198,313.22/623.16
  6. Step 6: Final answer
    x = 318.24

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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.