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Finding the Fourth Proportional to 376.40, 564.60 and 342.80

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Solution

The fourth proportional to 376.40, 564.60 and 342.80 is: 514.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.40 : 564.60 = 342.80 : x
  2. Step 2: Convert to fraction form
    376.40/564.60 = 342.80/x
  3. Step 3: Cross multiply
    376.40x = 564.60 × 342.80
  4. Step 4: Simplify right side
    376.40x = 193,544.88
  5. Step 5: Solve for x
    x = 193,544.88/376.40
  6. Step 6: Final answer
    x = 514.20

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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.