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Finding the Fourth Proportional to 259.11, 387.84 and 185.82

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Solution

The fourth proportional to 259.11, 387.84 and 185.82 is: 278.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.11 : 387.84 = 185.82 : x
  2. Step 2: Convert to fraction form
    259.11/387.84 = 185.82/x
  3. Step 3: Cross multiply
    259.11x = 387.84 × 185.82
  4. Step 4: Simplify right side
    259.11x = 72,068.43
  5. Step 5: Solve for x
    x = 72,068.43/259.11
  6. Step 6: Final answer
    x = 278.14

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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.