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Finding the Fourth Proportional to 361.84, 543.16 and 145.57

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Solution

The fourth proportional to 361.84, 543.16 and 145.57 is: 218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.84 : 543.16 = 145.57 : x
  2. Step 2: Convert to fraction form
    361.84/543.16 = 145.57/x
  3. Step 3: Cross multiply
    361.84x = 543.16 × 145.57
  4. Step 4: Simplify right side
    361.84x = 79,065.09
  5. Step 5: Solve for x
    x = 79,065.09/361.84
  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.