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Finding the Fourth Proportional to 622.70, 934.06 and 380.71

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Solution

The fourth proportional to 622.70, 934.06 and 380.71 is: 571.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.70 : 934.06 = 380.71 : x
  2. Step 2: Convert to fraction form
    622.70/934.06 = 380.71/x
  3. Step 3: Cross multiply
    622.70x = 934.06 × 380.71
  4. Step 4: Simplify right side
    622.70x = 355,605.98
  5. Step 5: Solve for x
    x = 355,605.98/622.70
  6. Step 6: Final answer
    x = 571.07

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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.