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Finding the Fourth Proportional to 319.14, 440.28 and 240.71

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Solution

The fourth proportional to 319.14, 440.28 and 240.71 is: 332.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.14 : 440.28 = 240.71 : x
  2. Step 2: Convert to fraction form
    319.14/440.28 = 240.71/x
  3. Step 3: Cross multiply
    319.14x = 440.28 × 240.71
  4. Step 4: Simplify right side
    319.14x = 105,977.60
  5. Step 5: Solve for x
    x = 105,977.60/319.14
  6. Step 6: Final answer
    x = 332.07

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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.