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Finding the Fourth Proportional to 1,083.65, 1,625.48 and 261.92

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Solution

The fourth proportional to 1,083.65, 1,625.48 and 261.92 is: 392.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.65 : 1,625.48 = 261.92 : x
  2. Step 2: Convert to fraction form
    1,083.65/1,625.48 = 261.92/x
  3. Step 3: Cross multiply
    1,083.65x = 1,625.48 × 261.92
  4. Step 4: Simplify right side
    1,083.65x = 425,750.44
  5. Step 5: Solve for x
    x = 425,750.44/1,083.65
  6. Step 6: Final answer
    x = 392.88

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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.