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Finding the Fourth Proportional to 943.62, 1,414.36 and 423.90

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Solution

The fourth proportional to 943.62, 1,414.36 and 423.90 is: 635.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.62 : 1,414.36 = 423.90 : x
  2. Step 2: Convert to fraction form
    943.62/1,414.36 = 423.90/x
  3. Step 3: Cross multiply
    943.62x = 1,414.36 × 423.90
  4. Step 4: Simplify right side
    943.62x = 599,547.73
  5. Step 5: Solve for x
    x = 599,547.73/943.62
  6. Step 6: Final answer
    x = 635.37

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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.