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Finding the Fourth Proportional to 372.99, 514.73 and 207.21

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Solution

The fourth proportional to 372.99, 514.73 and 207.21 is: 285.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.99 : 514.73 = 207.21 : x
  2. Step 2: Convert to fraction form
    372.99/514.73 = 207.21/x
  3. Step 3: Cross multiply
    372.99x = 514.73 × 207.21
  4. Step 4: Simplify right side
    372.99x = 106,657.72
  5. Step 5: Solve for x
    x = 106,657.72/372.99
  6. Step 6: Final answer
    x = 285.95

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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.