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Finding the Fourth Proportional to 1,335.48, 2,001.86 and 641.14

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Solution

The fourth proportional to 1,335.48, 2,001.86 and 641.14 is: 961.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.48 : 2,001.86 = 641.14 : x
  2. Step 2: Convert to fraction form
    1,335.48/2,001.86 = 641.14/x
  3. Step 3: Cross multiply
    1,335.48x = 2,001.86 × 641.14
  4. Step 4: Simplify right side
    1,335.48x = 1,283,472.52
  5. Step 5: Solve for x
    x = 1,283,472.52/1,335.48
  6. Step 6: Final answer
    x = 961.06

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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.