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Finding the Fourth Proportional to 439.93, 607.22 and 274.05

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Solution

The fourth proportional to 439.93, 607.22 and 274.05 is: 378.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.93 : 607.22 = 274.05 : x
  2. Step 2: Convert to fraction form
    439.93/607.22 = 274.05/x
  3. Step 3: Cross multiply
    439.93x = 607.22 × 274.05
  4. Step 4: Simplify right side
    439.93x = 166,407.05
  5. Step 5: Solve for x
    x = 166,407.05/439.93
  6. Step 6: Final answer
    x = 378.26

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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.