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Finding the Fourth Proportional to 1,335.36, 1,842.90 and 745.92

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Solution

The fourth proportional to 1,335.36, 1,842.90 and 745.92 is: 1,029.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.36 : 1,842.90 = 745.92 : x
  2. Step 2: Convert to fraction form
    1,335.36/1,842.90 = 745.92/x
  3. Step 3: Cross multiply
    1,335.36x = 1,842.90 × 745.92
  4. Step 4: Simplify right side
    1,335.36x = 1,374,655.97
  5. Step 5: Solve for x
    x = 1,374,655.97/1,335.36
  6. Step 6: Final answer
    x = 1,029.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.