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Finding the Fourth Proportional to 439.94, 607.10 and 274.07

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Solution

The fourth proportional to 439.94, 607.10 and 274.07 is: 378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.94 : 607.10 = 274.07 : x
  2. Step 2: Convert to fraction form
    439.94/607.10 = 274.07/x
  3. Step 3: Cross multiply
    439.94x = 607.10 × 274.07
  4. Step 4: Simplify right side
    439.94x = 166,385.55
  5. Step 5: Solve for x
    x = 166,385.55/439.94
  6. Step 6: Final answer
    x = 378.20

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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.