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Finding the Fourth Proportional to 439.76, 659.28 and 367.76

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Solution

The fourth proportional to 439.76, 659.28 and 367.76 is: 551.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.76 : 659.28 = 367.76 : x
  2. Step 2: Convert to fraction form
    439.76/659.28 = 367.76/x
  3. Step 3: Cross multiply
    439.76x = 659.28 × 367.76
  4. Step 4: Simplify right side
    439.76x = 242,456.81
  5. Step 5: Solve for x
    x = 242,456.81/439.76
  6. Step 6: Final answer
    x = 551.34

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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.