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Finding the Fourth Proportional to 191.42, 285.43 and 181.16

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Solution

The fourth proportional to 191.42, 285.43 and 181.16 is: 270.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.42 : 285.43 = 181.16 : x
  2. Step 2: Convert to fraction form
    191.42/285.43 = 181.16/x
  3. Step 3: Cross multiply
    191.42x = 285.43 × 181.16
  4. Step 4: Simplify right side
    191.42x = 51,708.50
  5. Step 5: Solve for x
    x = 51,708.50/191.42
  6. Step 6: Final answer
    x = 270.13

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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.