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Finding the Fourth Proportional to 426.78, 588.69 and 260.85

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Solution

The fourth proportional to 426.78, 588.69 and 260.85 is: 359.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.78 : 588.69 = 260.85 : x
  2. Step 2: Convert to fraction form
    426.78/588.69 = 260.85/x
  3. Step 3: Cross multiply
    426.78x = 588.69 × 260.85
  4. Step 4: Simplify right side
    426.78x = 153,559.79
  5. Step 5: Solve for x
    x = 153,559.79/426.78
  6. Step 6: Final answer
    x = 359.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.