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Finding the Fourth Proportional to 3,968.80, 5,951.68 and 1,887.20

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Solution

The fourth proportional to 3,968.80, 5,951.68 and 1,887.20 is: 2,830.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968.80 : 5,951.68 = 1,887.20 : x
  2. Step 2: Convert to fraction form
    3,968.80/5,951.68 = 1,887.20/x
  3. Step 3: Cross multiply
    3,968.80x = 5,951.68 × 1,887.20
  4. Step 4: Simplify right side
    3,968.80x = 11,231,998.34
  5. Step 5: Solve for x
    x = 11,231,998.34/3,968.80
  6. Step 6: Final answer
    x = 2,830.08

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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.