Home / 1,399.20-2,097.44-521.06

Finding the Fourth Proportional to 1,399.20, 2,097.44 and 521.06

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Solution

The fourth proportional to 1,399.20, 2,097.44 and 521.06 is: 781.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.20 : 2,097.44 = 521.06 : x
  2. Step 2: Convert to fraction form
    1,399.20/2,097.44 = 521.06/x
  3. Step 3: Cross multiply
    1,399.20x = 2,097.44 × 521.06
  4. Step 4: Simplify right side
    1,399.20x = 1,092,889.48
  5. Step 5: Solve for x
    x = 1,092,889.48/1,399.20
  6. Step 6: Final answer
    x = 781.08

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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.