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Finding the Fourth Proportional to 408.32, 563.10 and 275.84

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Solution

The fourth proportional to 408.32, 563.10 and 275.84 is: 380.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.32 : 563.10 = 275.84 : x
  2. Step 2: Convert to fraction form
    408.32/563.10 = 275.84/x
  3. Step 3: Cross multiply
    408.32x = 563.10 × 275.84
  4. Step 4: Simplify right side
    408.32x = 155,325.50
  5. Step 5: Solve for x
    x = 155,325.50/408.32
  6. Step 6: Final answer
    x = 380.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.