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Finding the Fourth Proportional to 362.05, 543.08 and 145.63

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Solution

The fourth proportional to 362.05, 543.08 and 145.63 is: 218.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.05 : 543.08 = 145.63 : x
  2. Step 2: Convert to fraction form
    362.05/543.08 = 145.63/x
  3. Step 3: Cross multiply
    362.05x = 543.08 × 145.63
  4. Step 4: Simplify right side
    362.05x = 79,088.74
  5. Step 5: Solve for x
    x = 79,088.74/362.05
  6. Step 6: Final answer
    x = 218.45

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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.