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Finding the Fourth Proportional to 391.09, 583.56 and 377.88

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Solution

The fourth proportional to 391.09, 583.56 and 377.88 is: 563.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.09 : 583.56 = 377.88 : x
  2. Step 2: Convert to fraction form
    391.09/583.56 = 377.88/x
  3. Step 3: Cross multiply
    391.09x = 583.56 × 377.88
  4. Step 4: Simplify right side
    391.09x = 220,516.60
  5. Step 5: Solve for x
    x = 220,516.60/391.09
  6. Step 6: Final answer
    x = 563.85

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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.