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Finding the Fourth Proportional to 310.93, 429.27 and 217.51

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Solution

The fourth proportional to 310.93, 429.27 and 217.51 is: 300.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.93 : 429.27 = 217.51 : x
  2. Step 2: Convert to fraction form
    310.93/429.27 = 217.51/x
  3. Step 3: Cross multiply
    310.93x = 429.27 × 217.51
  4. Step 4: Simplify right side
    310.93x = 93,370.52
  5. Step 5: Solve for x
    x = 93,370.52/310.93
  6. Step 6: Final answer
    x = 300.29

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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.