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Finding the Fourth Proportional to 284.26, 391.42 and 260.87

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Solution

The fourth proportional to 284.26, 391.42 and 260.87 is: 359.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.26 : 391.42 = 260.87 : x
  2. Step 2: Convert to fraction form
    284.26/391.42 = 260.87/x
  3. Step 3: Cross multiply
    284.26x = 391.42 × 260.87
  4. Step 4: Simplify right side
    284.26x = 102,109.74
  5. Step 5: Solve for x
    x = 102,109.74/284.26
  6. Step 6: Final answer
    x = 359.21

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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.