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Finding the Fourth Proportional to 191.37, 285.59 and 170.87

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Solution

The fourth proportional to 191.37, 285.59 and 170.87 is: 254.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.37 : 285.59 = 170.87 : x
  2. Step 2: Convert to fraction form
    191.37/285.59 = 170.87/x
  3. Step 3: Cross multiply
    191.37x = 285.59 × 170.87
  4. Step 4: Simplify right side
    191.37x = 48,796.48
  5. Step 5: Solve for x
    x = 48,796.48/191.37
  6. Step 6: Final answer
    x = 254.99

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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.