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Finding the Fourth Proportional to 298.71, 414.09 and 288.63

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Solution

The fourth proportional to 298.71, 414.09 and 288.63 is: 400.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.71 : 414.09 = 288.63 : x
  2. Step 2: Convert to fraction form
    298.71/414.09 = 288.63/x
  3. Step 3: Cross multiply
    298.71x = 414.09 × 288.63
  4. Step 4: Simplify right side
    298.71x = 119,518.80
  5. Step 5: Solve for x
    x = 119,518.80/298.71
  6. Step 6: Final answer
    x = 400.12

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.