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Finding the Fourth Proportional to 276.91, 414.73 and 260.50

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Solution

The fourth proportional to 276.91, 414.73 and 260.50 is: 390.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.91 : 414.73 = 260.50 : x
  2. Step 2: Convert to fraction form
    276.91/414.73 = 260.50/x
  3. Step 3: Cross multiply
    276.91x = 414.73 × 260.50
  4. Step 4: Simplify right side
    276.91x = 108,037.17
  5. Step 5: Solve for x
    x = 108,037.17/276.91
  6. Step 6: Final answer
    x = 390.15

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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.