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Finding the Fourth Proportional to 621, 932.31 and 578.21

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Solution

The fourth proportional to 621, 932.31 and 578.21 is: 868.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    621 : 932.31 = 578.21 : x
  2. Step 2: Convert to fraction form
    621/932.31 = 578.21/x
  3. Step 3: Cross multiply
    621x = 932.31 × 578.21
  4. Step 4: Simplify right side
    621x = 539,066.30
  5. Step 5: Solve for x
    x = 539,066.30/621
  6. Step 6: Final answer
    x = 868.06

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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.