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Finding the Fourth Proportional to 389, 583.49 and 183.43

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Solution

The fourth proportional to 389, 583.49 and 183.43 is: 275.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    389 : 583.49 = 183.43 : x
  2. Step 2: Convert to fraction form
    389/583.49 = 183.43/x
  3. Step 3: Cross multiply
    389x = 583.49 × 183.43
  4. Step 4: Simplify right side
    389x = 107,029.57
  5. Step 5: Solve for x
    x = 107,029.57/389
  6. Step 6: Final answer
    x = 275.14

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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.