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Finding the Fourth Proportional to 259.95, 389.97 and 95.43

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Solution

The fourth proportional to 259.95, 389.97 and 95.43 is: 143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.95 : 389.97 = 95.43 : x
  2. Step 2: Convert to fraction form
    259.95/389.97 = 95.43/x
  3. Step 3: Cross multiply
    259.95x = 389.97 × 95.43
  4. Step 4: Simplify right side
    259.95x = 37,214.84
  5. Step 5: Solve for x
    x = 37,214.84/259.95
  6. Step 6: Final answer
    x = 143.16

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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.