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Finding the Fourth Proportional to 376.39, 564.50 and 145.21

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Solution

The fourth proportional to 376.39, 564.50 and 145.21 is: 217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.39 : 564.50 = 145.21 : x
  2. Step 2: Convert to fraction form
    376.39/564.50 = 145.21/x
  3. Step 3: Cross multiply
    376.39x = 564.50 × 145.21
  4. Step 4: Simplify right side
    376.39x = 81,968.77
  5. Step 5: Solve for x
    x = 81,968.77/376.39
  6. Step 6: Final answer
    x = 217.77

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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.