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Finding the Fourth Proportional to 3,808.32, 5,711.48 and 1,309.48

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Solution

The fourth proportional to 3,808.32, 5,711.48 and 1,309.48 is: 1,963.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808.32 : 5,711.48 = 1,309.48 : x
  2. Step 2: Convert to fraction form
    3,808.32/5,711.48 = 1,309.48/x
  3. Step 3: Cross multiply
    3,808.32x = 5,711.48 × 1,309.48
  4. Step 4: Simplify right side
    3,808.32x = 7,479,068.83
  5. Step 5: Solve for x
    x = 7,479,068.83/3,808.32
  6. Step 6: Final answer
    x = 1,963.88

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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.