Home / 1,353.28-2,028.40-487.36

Finding the Fourth Proportional to 1,353.28, 2,028.40 and 487.36

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Solution

The fourth proportional to 1,353.28, 2,028.40 and 487.36 is: 730.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.28 : 2,028.40 = 487.36 : x
  2. Step 2: Convert to fraction form
    1,353.28/2,028.40 = 487.36/x
  3. Step 3: Cross multiply
    1,353.28x = 2,028.40 × 487.36
  4. Step 4: Simplify right side
    1,353.28x = 988,561.02
  5. Step 5: Solve for x
    x = 988,561.02/1,353.28
  6. Step 6: Final answer
    x = 730.49

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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.