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Finding the Fourth Proportional to 260.10, 389.78 and 97.62

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Solution

The fourth proportional to 260.10, 389.78 and 97.62 is: 146.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.10 : 389.78 = 97.62 : x
  2. Step 2: Convert to fraction form
    260.10/389.78 = 97.62/x
  3. Step 3: Cross multiply
    260.10x = 389.78 × 97.62
  4. Step 4: Simplify right side
    260.10x = 38,050.32
  5. Step 5: Solve for x
    x = 38,050.32/260.10
  6. Step 6: Final answer
    x = 146.29

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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.