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Finding the Fourth Proportional to 1,308.89, 1,963.34 and 443.81

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Solution

The fourth proportional to 1,308.89, 1,963.34 and 443.81 is: 665.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.89 : 1,963.34 = 443.81 : x
  2. Step 2: Convert to fraction form
    1,308.89/1,963.34 = 443.81/x
  3. Step 3: Cross multiply
    1,308.89x = 1,963.34 × 443.81
  4. Step 4: Simplify right side
    1,308.89x = 871,349.93
  5. Step 5: Solve for x
    x = 871,349.93/1,308.89
  6. Step 6: Final answer
    x = 665.72

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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.