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Finding the Fourth Proportional to 259.76, 389.51 and 97.34

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Solution

The fourth proportional to 259.76, 389.51 and 97.34 is: 145.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.76 : 389.51 = 97.34 : x
  2. Step 2: Convert to fraction form
    259.76/389.51 = 97.34/x
  3. Step 3: Cross multiply
    259.76x = 389.51 × 97.34
  4. Step 4: Simplify right side
    259.76x = 37,913.20
  5. Step 5: Solve for x
    x = 37,913.20/259.76
  6. Step 6: Final answer
    x = 145.96

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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.