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Finding the Fourth Proportional to 237.79, 358.44 and 217.28

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Solution

The fourth proportional to 237.79, 358.44 and 217.28 is: 327.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.79 : 358.44 = 217.28 : x
  2. Step 2: Convert to fraction form
    237.79/358.44 = 217.28/x
  3. Step 3: Cross multiply
    237.79x = 358.44 × 217.28
  4. Step 4: Simplify right side
    237.79x = 77,881.84
  5. Step 5: Solve for x
    x = 77,881.84/237.79
  6. Step 6: Final answer
    x = 327.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.