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Finding the Fourth Proportional to 335.24, 502.84 and 91.78

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Solution

The fourth proportional to 335.24, 502.84 and 91.78 is: 137.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.24 : 502.84 = 91.78 : x
  2. Step 2: Convert to fraction form
    335.24/502.84 = 91.78/x
  3. Step 3: Cross multiply
    335.24x = 502.84 × 91.78
  4. Step 4: Simplify right side
    335.24x = 46,150.66
  5. Step 5: Solve for x
    x = 46,150.66/335.24
  6. Step 6: Final answer
    x = 137.66

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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.