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Finding the Fourth Proportional to 621.38, 930.17 and 414.29

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Solution

The fourth proportional to 621.38, 930.17 and 414.29 is: 620.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.38 : 930.17 = 414.29 : x
  2. Step 2: Convert to fraction form
    621.38/930.17 = 414.29/x
  3. Step 3: Cross multiply
    621.38x = 930.17 × 414.29
  4. Step 4: Simplify right side
    621.38x = 385,356.51
  5. Step 5: Solve for x
    x = 385,356.51/621.38
  6. Step 6: Final answer
    x = 620.17

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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.