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Finding the Fourth Proportional to 376.40, 564.28 and 145.16

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Solution

The fourth proportional to 376.40, 564.28 and 145.16 is: 217.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.40 : 564.28 = 145.16 : x
  2. Step 2: Convert to fraction form
    376.40/564.28 = 145.16/x
  3. Step 3: Cross multiply
    376.40x = 564.28 × 145.16
  4. Step 4: Simplify right side
    376.40x = 81,910.88
  5. Step 5: Solve for x
    x = 81,910.88/376.40
  6. Step 6: Final answer
    x = 217.62

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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.