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Finding the Fourth Proportional to 259.52, 389.21 and 97.14

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Solution

The fourth proportional to 259.52, 389.21 and 97.14 is: 145.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.52 : 389.21 = 97.14 : x
  2. Step 2: Convert to fraction form
    259.52/389.21 = 97.14/x
  3. Step 3: Cross multiply
    259.52x = 389.21 × 97.14
  4. Step 4: Simplify right side
    259.52x = 37,808.10
  5. Step 5: Solve for x
    x = 37,808.10/259.52
  6. Step 6: Final answer
    x = 145.69

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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.