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Finding the Fourth Proportional to 3,999.60, 5,966.10 and 3,805.20

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Solution

The fourth proportional to 3,999.60, 5,966.10 and 3,805.20 is: 5,676.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.60 : 5,966.10 = 3,805.20 : x
  2. Step 2: Convert to fraction form
    3,999.60/5,966.10 = 3,805.20/x
  3. Step 3: Cross multiply
    3,999.60x = 5,966.10 × 3,805.20
  4. Step 4: Simplify right side
    3,999.60x = 22,702,203.72
  5. Step 5: Solve for x
    x = 22,702,203.72/3,999.60
  6. Step 6: Final answer
    x = 5,676.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.