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Finding the Fourth Proportional to 621.63, 927.89 and 576.57

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Solution

The fourth proportional to 621.63, 927.89 and 576.57 is: 860.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.63 : 927.89 = 576.57 : x
  2. Step 2: Convert to fraction form
    621.63/927.89 = 576.57/x
  3. Step 3: Cross multiply
    621.63x = 927.89 × 576.57
  4. Step 4: Simplify right side
    621.63x = 534,990.65
  5. Step 5: Solve for x
    x = 534,990.65/621.63
  6. Step 6: Final answer
    x = 860.63

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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.