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Finding the Fourth Proportional to 237.10, 353.93 and 220.21

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Solution

The fourth proportional to 237.10, 353.93 and 220.21 is: 328.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.10 : 353.93 = 220.21 : x
  2. Step 2: Convert to fraction form
    237.10/353.93 = 220.21/x
  3. Step 3: Cross multiply
    237.10x = 353.93 × 220.21
  4. Step 4: Simplify right side
    237.10x = 77,938.93
  5. Step 5: Solve for x
    x = 77,938.93/237.10
  6. Step 6: Final answer
    x = 328.72

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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.