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Finding the Fourth Proportional to 279.74, 419.88 and 192.87

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Solution

The fourth proportional to 279.74, 419.88 and 192.87 is: 289.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.74 : 419.88 = 192.87 : x
  2. Step 2: Convert to fraction form
    279.74/419.88 = 192.87/x
  3. Step 3: Cross multiply
    279.74x = 419.88 × 192.87
  4. Step 4: Simplify right side
    279.74x = 80,982.26
  5. Step 5: Solve for x
    x = 80,982.26/279.74
  6. Step 6: Final answer
    x = 289.50

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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.