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Finding the Fourth Proportional to 626.40, 943.20 and 482.40

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Solution

The fourth proportional to 626.40, 943.20 and 482.40 is: 726.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.40 : 943.20 = 482.40 : x
  2. Step 2: Convert to fraction form
    626.40/943.20 = 482.40/x
  3. Step 3: Cross multiply
    626.40x = 943.20 × 482.40
  4. Step 4: Simplify right side
    626.40x = 454,999.68
  5. Step 5: Solve for x
    x = 454,999.68/626.40
  6. Step 6: Final answer
    x = 726.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.