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Finding the Fourth Proportional to 575.54, 863.30 and 142.70

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Solution

The fourth proportional to 575.54, 863.30 and 142.70 is: 214.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.54 : 863.30 = 142.70 : x
  2. Step 2: Convert to fraction form
    575.54/863.30 = 142.70/x
  3. Step 3: Cross multiply
    575.54x = 863.30 × 142.70
  4. Step 4: Simplify right side
    575.54x = 123,187.88
  5. Step 5: Solve for x
    x = 123,187.88/575.54
  6. Step 6: Final answer
    x = 214.04

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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.