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Finding the Fourth Proportional to 298.53, 409.55 and 279.90

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Solution

The fourth proportional to 298.53, 409.55 and 279.90 is: 383.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.53 : 409.55 = 279.90 : x
  2. Step 2: Convert to fraction form
    298.53/409.55 = 279.90/x
  3. Step 3: Cross multiply
    298.53x = 409.55 × 279.90
  4. Step 4: Simplify right side
    298.53x = 114,631.65
  5. Step 5: Solve for x
    x = 114,631.65/298.53
  6. Step 6: Final answer
    x = 383.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.