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Finding the Fourth Proportional to 944.36, 1,415.34 and 423.62

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Solution

The fourth proportional to 944.36, 1,415.34 and 423.62 is: 634.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.36 : 1,415.34 = 423.62 : x
  2. Step 2: Convert to fraction form
    944.36/1,415.34 = 423.62/x
  3. Step 3: Cross multiply
    944.36x = 1,415.34 × 423.62
  4. Step 4: Simplify right side
    944.36x = 599,559.25
  5. Step 5: Solve for x
    x = 599,559.25/944.36
  6. Step 6: Final answer
    x = 634.89

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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.