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Finding the Fourth Proportional to 368.56, 552.81 and 143.18

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Solution

The fourth proportional to 368.56, 552.81 and 143.18 is: 214.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.56 : 552.81 = 143.18 : x
  2. Step 2: Convert to fraction form
    368.56/552.81 = 143.18/x
  3. Step 3: Cross multiply
    368.56x = 552.81 × 143.18
  4. Step 4: Simplify right side
    368.56x = 79,148.57
  5. Step 5: Solve for x
    x = 79,148.57/368.56
  6. Step 6: Final answer
    x = 214.75

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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.