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Finding the Fourth Proportional to 357.28, 535.74 and 174.40

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Solution

The fourth proportional to 357.28, 535.74 and 174.40 is: 261.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.28 : 535.74 = 174.40 : x
  2. Step 2: Convert to fraction form
    357.28/535.74 = 174.40/x
  3. Step 3: Cross multiply
    357.28x = 535.74 × 174.40
  4. Step 4: Simplify right side
    357.28x = 93,433.06
  5. Step 5: Solve for x
    x = 93,433.06/357.28
  6. Step 6: Final answer
    x = 261.51

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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.