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Finding the Fourth Proportional to 2,539.79, 3,808.85 and 808.01

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Solution

The fourth proportional to 2,539.79, 3,808.85 and 808.01 is: 1,211.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,539.79 : 3,808.85 = 808.01 : x
  2. Step 2: Convert to fraction form
    2,539.79/3,808.85 = 808.01/x
  3. Step 3: Cross multiply
    2,539.79x = 3,808.85 × 808.01
  4. Step 4: Simplify right side
    2,539.79x = 3,077,571.86
  5. Step 5: Solve for x
    x = 3,077,571.86/2,539.79
  6. Step 6: Final answer
    x = 1,211.75

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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.