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Finding the Fourth Proportional to 2,092.36, 3,139.14 and 631.48

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Solution

The fourth proportional to 2,092.36, 3,139.14 and 631.48 is: 947.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,092.36 : 3,139.14 = 631.48 : x
  2. Step 2: Convert to fraction form
    2,092.36/3,139.14 = 631.48/x
  3. Step 3: Cross multiply
    2,092.36x = 3,139.14 × 631.48
  4. Step 4: Simplify right side
    2,092.36x = 1,982,304.13
  5. Step 5: Solve for x
    x = 1,982,304.13/2,092.36
  6. Step 6: Final answer
    x = 947.40

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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.