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Finding the Fourth Proportional to 943.92, 1,415.88 and 396.08

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Solution

The fourth proportional to 943.92, 1,415.88 and 396.08 is: 594.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.92 : 1,415.88 = 396.08 : x
  2. Step 2: Convert to fraction form
    943.92/1,415.88 = 396.08/x
  3. Step 3: Cross multiply
    943.92x = 1,415.88 × 396.08
  4. Step 4: Simplify right side
    943.92x = 560,801.75
  5. Step 5: Solve for x
    x = 560,801.75/943.92
  6. Step 6: Final answer
    x = 594.12

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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.