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Finding the Fourth Proportional to 943.82, 1,302.48 and 518.43

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Solution

The fourth proportional to 943.82, 1,302.48 and 518.43 is: 715.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.82 : 1,302.48 = 518.43 : x
  2. Step 2: Convert to fraction form
    943.82/1,302.48 = 518.43/x
  3. Step 3: Cross multiply
    943.82x = 1,302.48 × 518.43
  4. Step 4: Simplify right side
    943.82x = 675,244.71
  5. Step 5: Solve for x
    x = 675,244.71/943.82
  6. Step 6: Final answer
    x = 715.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.