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Finding the Fourth Proportional to 375.47, 563.21 and 144.30

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Solution

The fourth proportional to 375.47, 563.21 and 144.30 is: 216.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.47 : 563.21 = 144.30 : x
  2. Step 2: Convert to fraction form
    375.47/563.21 = 144.30/x
  3. Step 3: Cross multiply
    375.47x = 563.21 × 144.30
  4. Step 4: Simplify right side
    375.47x = 81,273.54
  5. Step 5: Solve for x
    x = 81,273.54/375.47
  6. Step 6: Final answer
    x = 216.46

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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.