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Finding the Fourth Proportional to 1,028.12, 1,542.52 and 480.00

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Solution

The fourth proportional to 1,028.12, 1,542.52 and 480.00 is: 720.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.12 : 1,542.52 = 480.00 : x
  2. Step 2: Convert to fraction form
    1,028.12/1,542.52 = 480.00/x
  3. Step 3: Cross multiply
    1,028.12x = 1,542.52 × 480.00
  4. Step 4: Simplify right side
    1,028.12x = 740,410.30
  5. Step 5: Solve for x
    x = 740,410.30/1,028.12
  6. Step 6: Final answer
    x = 720.16

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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.