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Finding the Fourth Proportional to 1,938.29, 2,905.90 and 963.86

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Solution

The fourth proportional to 1,938.29, 2,905.90 and 963.86 is: 1,445.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.29 : 2,905.90 = 963.86 : x
  2. Step 2: Convert to fraction form
    1,938.29/2,905.90 = 963.86/x
  3. Step 3: Cross multiply
    1,938.29x = 2,905.90 × 963.86
  4. Step 4: Simplify right side
    1,938.29x = 2,800,863.83
  5. Step 5: Solve for x
    x = 2,800,863.83/1,938.29
  6. Step 6: Final answer
    x = 1,445.02

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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.