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Finding the Fourth Proportional to 622.86, 934.11 and 330.21

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Solution

The fourth proportional to 622.86, 934.11 and 330.21 is: 495.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.86 : 934.11 = 330.21 : x
  2. Step 2: Convert to fraction form
    622.86/934.11 = 330.21/x
  3. Step 3: Cross multiply
    622.86x = 934.11 × 330.21
  4. Step 4: Simplify right side
    622.86x = 308,455.48
  5. Step 5: Solve for x
    x = 308,455.48/622.86
  6. Step 6: Final answer
    x = 495.23

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Double scale
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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.