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Finding the Fourth Proportional to 372.57, 514.09 and 206.78

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Solution

The fourth proportional to 372.57, 514.09 and 206.78 is: 285.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.57 : 514.09 = 206.78 : x
  2. Step 2: Convert to fraction form
    372.57/514.09 = 206.78/x
  3. Step 3: Cross multiply
    372.57x = 514.09 × 206.78
  4. Step 4: Simplify right side
    372.57x = 106,301.22
  5. Step 5: Solve for x
    x = 106,301.22/372.57
  6. Step 6: Final answer
    x = 285.32

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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.