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Finding the Fourth Proportional to 439.92, 607.40 and 274.17

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Solution

The fourth proportional to 439.92, 607.40 and 274.17 is: 378.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.92 : 607.40 = 274.17 : x
  2. Step 2: Convert to fraction form
    439.92/607.40 = 274.17/x
  3. Step 3: Cross multiply
    439.92x = 607.40 × 274.17
  4. Step 4: Simplify right side
    439.92x = 166,529.49
  5. Step 5: Solve for x
    x = 166,529.49/439.92
  6. Step 6: Final answer
    x = 378.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.