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Finding the Fourth Proportional to 237.19, 355.78 and 66.19

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Solution

The fourth proportional to 237.19, 355.78 and 66.19 is: 99.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.19 : 355.78 = 66.19 : x
  2. Step 2: Convert to fraction form
    237.19/355.78 = 66.19/x
  3. Step 3: Cross multiply
    237.19x = 355.78 × 66.19
  4. Step 4: Simplify right side
    237.19x = 23,548.27
  5. Step 5: Solve for x
    x = 23,548.27/237.19
  6. Step 6: Final answer
    x = 99.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.