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Finding the Fourth Proportional to 439.69, 607.05 and 274.14

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Solution

The fourth proportional to 439.69, 607.05 and 274.14 is: 378.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.69 : 607.05 = 274.14 : x
  2. Step 2: Convert to fraction form
    439.69/607.05 = 274.14/x
  3. Step 3: Cross multiply
    439.69x = 607.05 × 274.14
  4. Step 4: Simplify right side
    439.69x = 166,415.32
  5. Step 5: Solve for x
    x = 166,415.32/439.69
  6. Step 6: Final answer
    x = 378.49

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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.