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Finding the Fourth Proportional to 3,938.63, 5,908.75 and 1,630.13

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Solution

The fourth proportional to 3,938.63, 5,908.75 and 1,630.13 is: 2,445.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.63 : 5,908.75 = 1,630.13 : x
  2. Step 2: Convert to fraction form
    3,938.63/5,908.75 = 1,630.13/x
  3. Step 3: Cross multiply
    3,938.63x = 5,908.75 × 1,630.13
  4. Step 4: Simplify right side
    3,938.63x = 9,631,997.02
  5. Step 5: Solve for x
    x = 9,631,997.02/3,938.63
  6. Step 6: Final answer
    x = 2,445.52

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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.