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Finding the Fourth Proportional to 251.13, 374.84 and 216.28

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Solution

The fourth proportional to 251.13, 374.84 and 216.28 is: 322.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.13 : 374.84 = 216.28 : x
  2. Step 2: Convert to fraction form
    251.13/374.84 = 216.28/x
  3. Step 3: Cross multiply
    251.13x = 374.84 × 216.28
  4. Step 4: Simplify right side
    251.13x = 81,068.93
  5. Step 5: Solve for x
    x = 81,068.93/251.13
  6. Step 6: Final answer
    x = 322.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.