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Finding the Fourth Proportional to 5,388.78, 8,083.18 and 1,691.30

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Solution

The fourth proportional to 5,388.78, 8,083.18 and 1,691.30 is: 2,536.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,388.78 : 8,083.18 = 1,691.30 : x
  2. Step 2: Convert to fraction form
    5,388.78/8,083.18 = 1,691.30/x
  3. Step 3: Cross multiply
    5,388.78x = 8,083.18 × 1,691.30
  4. Step 4: Simplify right side
    5,388.78x = 13,671,073.88
  5. Step 5: Solve for x
    x = 13,671,073.88/5,388.78
  6. Step 6: Final answer
    x = 2,536.95

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1.5x scale

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.