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Finding the Fourth Proportional to 621.28, 931.76 and 377.76

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Solution

The fourth proportional to 621.28, 931.76 and 377.76 is: 566.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.28 : 931.76 = 377.76 : x
  2. Step 2: Convert to fraction form
    621.28/931.76 = 377.76/x
  3. Step 3: Cross multiply
    621.28x = 931.76 × 377.76
  4. Step 4: Simplify right side
    621.28x = 351,981.66
  5. Step 5: Solve for x
    x = 351,981.66/621.28
  6. Step 6: Final answer
    x = 566.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.