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Finding the Fourth Proportional to 253.71, 377.90 and 240.71

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Solution

The fourth proportional to 253.71, 377.90 and 240.71 is: 358.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.71 : 377.90 = 240.71 : x
  2. Step 2: Convert to fraction form
    253.71/377.90 = 240.71/x
  3. Step 3: Cross multiply
    253.71x = 377.90 × 240.71
  4. Step 4: Simplify right side
    253.71x = 90,961.22
  5. Step 5: Solve for x
    x = 90,961.22/253.71
  6. Step 6: Final answer
    x = 358.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.