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Finding the Fourth Proportional to 1,083.95, 1,495.97 and 641.85

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Solution

The fourth proportional to 1,083.95, 1,495.97 and 641.85 is: 885.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.95 : 1,495.97 = 641.85 : x
  2. Step 2: Convert to fraction form
    1,083.95/1,495.97 = 641.85/x
  3. Step 3: Cross multiply
    1,083.95x = 1,495.97 × 641.85
  4. Step 4: Simplify right side
    1,083.95x = 960,181.93
  5. Step 5: Solve for x
    x = 960,181.93/1,083.95
  6. Step 6: Final answer
    x = 885.82

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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.