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Finding the Fourth Proportional to 440.70, 607.80 and 274.59

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Solution

The fourth proportional to 440.70, 607.80 and 274.59 is: 378.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.70 : 607.80 = 274.59 : x
  2. Step 2: Convert to fraction form
    440.70/607.80 = 274.59/x
  3. Step 3: Cross multiply
    440.70x = 607.80 × 274.59
  4. Step 4: Simplify right side
    440.70x = 166,895.80
  5. Step 5: Solve for x
    x = 166,895.80/440.70
  6. Step 6: Final answer
    x = 378.71

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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.