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Finding the Fourth Proportional to 260.13, 387.79 and 240.69

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Solution

The fourth proportional to 260.13, 387.79 and 240.69 is: 358.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.13 : 387.79 = 240.69 : x
  2. Step 2: Convert to fraction form
    260.13/387.79 = 240.69/x
  3. Step 3: Cross multiply
    260.13x = 387.79 × 240.69
  4. Step 4: Simplify right side
    260.13x = 93,336.57
  5. Step 5: Solve for x
    x = 93,336.57/260.13
  6. Step 6: Final answer
    x = 358.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.