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Finding the Fourth Proportional to 377.97, 521.40 and 247.05

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Solution

The fourth proportional to 377.97, 521.40 and 247.05 is: 340.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.97 : 521.40 = 247.05 : x
  2. Step 2: Convert to fraction form
    377.97/521.40 = 247.05/x
  3. Step 3: Cross multiply
    377.97x = 521.40 × 247.05
  4. Step 4: Simplify right side
    377.97x = 128,811.87
  5. Step 5: Solve for x
    x = 128,811.87/377.97
  6. Step 6: Final answer
    x = 340.80

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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.