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Finding the Fourth Proportional to 940.46, 1,408.87 and 529.87

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Solution

The fourth proportional to 940.46, 1,408.87 and 529.87 is: 793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.46 : 1,408.87 = 529.87 : x
  2. Step 2: Convert to fraction form
    940.46/1,408.87 = 529.87/x
  3. Step 3: Cross multiply
    940.46x = 1,408.87 × 529.87
  4. Step 4: Simplify right side
    940.46x = 746,517.95
  5. Step 5: Solve for x
    x = 746,517.95/940.46
  6. Step 6: Final answer
    x = 793.78

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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.