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Finding the Fourth Proportional to 362.31, 543.47 and 145.73

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Solution

The fourth proportional to 362.31, 543.47 and 145.73 is: 218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.31 : 543.47 = 145.73 : x
  2. Step 2: Convert to fraction form
    362.31/543.47 = 145.73/x
  3. Step 3: Cross multiply
    362.31x = 543.47 × 145.73
  4. Step 4: Simplify right side
    362.31x = 79,200.51
  5. Step 5: Solve for x
    x = 79,200.51/362.31
  6. Step 6: Final answer
    x = 218.60

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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.