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Finding the Fourth Proportional to 362.46, 543.28 and 145.78

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Solution

The fourth proportional to 362.46, 543.28 and 145.78 is: 218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.46 : 543.28 = 145.78 : x
  2. Step 2: Convert to fraction form
    362.46/543.28 = 145.78/x
  3. Step 3: Cross multiply
    362.46x = 543.28 × 145.78
  4. Step 4: Simplify right side
    362.46x = 79,199.36
  5. Step 5: Solve for x
    x = 79,199.36/362.46
  6. Step 6: Final answer
    x = 218.51

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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.