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Finding the Fourth Proportional to 944.14, 1,416.20 and 396.40

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Solution

The fourth proportional to 944.14, 1,416.20 and 396.40 is: 594.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.14 : 1,416.20 = 396.40 : x
  2. Step 2: Convert to fraction form
    944.14/1,416.20 = 396.40/x
  3. Step 3: Cross multiply
    944.14x = 1,416.20 × 396.40
  4. Step 4: Simplify right side
    944.14x = 561,381.68
  5. Step 5: Solve for x
    x = 561,381.68/944.14
  6. Step 6: Final answer
    x = 594.60

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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.