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Finding the Fourth Proportional to 376.40, 563.16 and 280.64

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Solution

The fourth proportional to 376.40, 563.16 and 280.64 is: 419.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.40 : 563.16 = 280.64 : x
  2. Step 2: Convert to fraction form
    376.40/563.16 = 280.64/x
  3. Step 3: Cross multiply
    376.40x = 563.16 × 280.64
  4. Step 4: Simplify right side
    376.40x = 158,045.22
  5. Step 5: Solve for x
    x = 158,045.22/376.40
  6. Step 6: Final answer
    x = 419.89

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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.