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Finding the Fourth Proportional to 4,486.31, 6,728.95 and 1,199.66

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Solution

The fourth proportional to 4,486.31, 6,728.95 and 1,199.66 is: 1,799.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,486.31 : 6,728.95 = 1,199.66 : x
  2. Step 2: Convert to fraction form
    4,486.31/6,728.95 = 1,199.66/x
  3. Step 3: Cross multiply
    4,486.31x = 6,728.95 × 1,199.66
  4. Step 4: Simplify right side
    4,486.31x = 8,072,432.10
  5. Step 5: Solve for x
    x = 8,072,432.10/4,486.31
  6. Step 6: Final answer
    x = 1,799.35

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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.