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Finding the Fourth Proportional to 357.38, 535.78 and 220.10

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Solution

The fourth proportional to 357.38, 535.78 and 220.10 is: 329.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.38 : 535.78 = 220.10 : x
  2. Step 2: Convert to fraction form
    357.38/535.78 = 220.10/x
  3. Step 3: Cross multiply
    357.38x = 535.78 × 220.10
  4. Step 4: Simplify right side
    357.38x = 117,925.18
  5. Step 5: Solve for x
    x = 117,925.18/357.38
  6. Step 6: Final answer
    x = 329.97

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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.