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Finding the Fourth Proportional to 2,301.31, 3,451.97 and 840.45

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Solution

The fourth proportional to 2,301.31, 3,451.97 and 840.45 is: 1,260.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,301.31 : 3,451.97 = 840.45 : x
  2. Step 2: Convert to fraction form
    2,301.31/3,451.97 = 840.45/x
  3. Step 3: Cross multiply
    2,301.31x = 3,451.97 × 840.45
  4. Step 4: Simplify right side
    2,301.31x = 2,901,208.19
  5. Step 5: Solve for x
    x = 2,901,208.19/2,301.31
  6. Step 6: Final answer
    x = 1,260.68

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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.