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Finding the Fourth Proportional to 357.87, 535.59 and 221.01

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Solution

The fourth proportional to 357.87, 535.59 and 221.01 is: 330.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.87 : 535.59 = 221.01 : x
  2. Step 2: Convert to fraction form
    357.87/535.59 = 221.01/x
  3. Step 3: Cross multiply
    357.87x = 535.59 × 221.01
  4. Step 4: Simplify right side
    357.87x = 118,370.75
  5. Step 5: Solve for x
    x = 118,370.75/357.87
  6. Step 6: Final answer
    x = 330.76

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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.