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Finding the Fourth Proportional to 3,920.68, 5,881.16 and 1,288.24

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Solution

The fourth proportional to 3,920.68, 5,881.16 and 1,288.24 is: 1,932.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.68 : 5,881.16 = 1,288.24 : x
  2. Step 2: Convert to fraction form
    3,920.68/5,881.16 = 1,288.24/x
  3. Step 3: Cross multiply
    3,920.68x = 5,881.16 × 1,288.24
  4. Step 4: Simplify right side
    3,920.68x = 7,576,345.56
  5. Step 5: Solve for x
    x = 7,576,345.56/3,920.68
  6. Step 6: Final answer
    x = 1,932.41

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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.