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Finding the Fourth Proportional to 307.74, 425.19 and 268.86

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Solution

The fourth proportional to 307.74, 425.19 and 268.86 is: 371.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.74 : 425.19 = 268.86 : x
  2. Step 2: Convert to fraction form
    307.74/425.19 = 268.86/x
  3. Step 3: Cross multiply
    307.74x = 425.19 × 268.86
  4. Step 4: Simplify right side
    307.74x = 114,316.58
  5. Step 5: Solve for x
    x = 114,316.58/307.74
  6. Step 6: Final answer
    x = 371.47

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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.