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Finding the Fourth Proportional to 1,028.70, 1,542.24 and 480.33

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Solution

The fourth proportional to 1,028.70, 1,542.24 and 480.33 is: 720.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.70 : 1,542.24 = 480.33 : x
  2. Step 2: Convert to fraction form
    1,028.70/1,542.24 = 480.33/x
  3. Step 3: Cross multiply
    1,028.70x = 1,542.24 × 480.33
  4. Step 4: Simplify right side
    1,028.70x = 740,784.14
  5. Step 5: Solve for x
    x = 740,784.14/1,028.70
  6. Step 6: Final answer
    x = 720.12

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Double scale
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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.