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Finding the Fourth Proportional to 400.20, 600.28 and 143.52

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Solution

The fourth proportional to 400.20, 600.28 and 143.52 is: 215.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.20 : 600.28 = 143.52 : x
  2. Step 2: Convert to fraction form
    400.20/600.28 = 143.52/x
  3. Step 3: Cross multiply
    400.20x = 600.28 × 143.52
  4. Step 4: Simplify right side
    400.20x = 86,152.19
  5. Step 5: Solve for x
    x = 86,152.19/400.20
  6. Step 6: Final answer
    x = 215.27

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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.