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Finding the Fourth Proportional to 944.80, 1,415.75 and 396.68

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Solution

The fourth proportional to 944.80, 1,415.75 and 396.68 is: 594.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.80 : 1,415.75 = 396.68 : x
  2. Step 2: Convert to fraction form
    944.80/1,415.75 = 396.68/x
  3. Step 3: Cross multiply
    944.80x = 1,415.75 × 396.68
  4. Step 4: Simplify right side
    944.80x = 561,593.91
  5. Step 5: Solve for x
    x = 561,593.91/944.80
  6. Step 6: Final answer
    x = 594.41

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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.