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Finding the Fourth Proportional to 286.82, 430.32 and 113.48

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Solution

The fourth proportional to 286.82, 430.32 and 113.48 is: 170.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.82 : 430.32 = 113.48 : x
  2. Step 2: Convert to fraction form
    286.82/430.32 = 113.48/x
  3. Step 3: Cross multiply
    286.82x = 430.32 × 113.48
  4. Step 4: Simplify right side
    286.82x = 48,832.71
  5. Step 5: Solve for x
    x = 48,832.71/286.82
  6. Step 6: Final answer
    x = 170.26

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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.