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Finding the Fourth Proportional to 269.92, 402.76 and 260.64

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Solution

The fourth proportional to 269.92, 402.76 and 260.64 is: 388.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.92 : 402.76 = 260.64 : x
  2. Step 2: Convert to fraction form
    269.92/402.76 = 260.64/x
  3. Step 3: Cross multiply
    269.92x = 402.76 × 260.64
  4. Step 4: Simplify right side
    269.92x = 104,975.37
  5. Step 5: Solve for x
    x = 104,975.37/269.92
  6. Step 6: Final answer
    x = 388.91

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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.