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Finding the Fourth Proportional to 374.08, 516.20 and 216.72

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Solution

The fourth proportional to 374.08, 516.20 and 216.72 is: 299.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.08 : 516.20 = 216.72 : x
  2. Step 2: Convert to fraction form
    374.08/516.20 = 216.72/x
  3. Step 3: Cross multiply
    374.08x = 516.20 × 216.72
  4. Step 4: Simplify right side
    374.08x = 111,870.86
  5. Step 5: Solve for x
    x = 111,870.86/374.08
  6. Step 6: Final answer
    x = 299.06

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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.