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Finding the Fourth Proportional to 1,353.30, 2,028.73 and 487

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Solution

The fourth proportional to 1,353.30, 2,028.73 and 487 is: 730.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.30 : 2,028.73 = 487 : x
  2. Step 2: Convert to fraction form
    1,353.30/2,028.73 = 487/x
  3. Step 3: Cross multiply
    1,353.30x = 2,028.73 × 487
  4. Step 4: Simplify right side
    1,353.30x = 987,991.51
  5. Step 5: Solve for x
    x = 987,991.51/1,353.30
  6. Step 6: Final answer
    x = 730.06

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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.