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Finding the Fourth Proportional to 1,086.81, 1,630.22 and 265.08

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Solution

The fourth proportional to 1,086.81, 1,630.22 and 265.08 is: 397.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.81 : 1,630.22 = 265.08 : x
  2. Step 2: Convert to fraction form
    1,086.81/1,630.22 = 265.08/x
  3. Step 3: Cross multiply
    1,086.81x = 1,630.22 × 265.08
  4. Step 4: Simplify right side
    1,086.81x = 432,138.72
  5. Step 5: Solve for x
    x = 432,138.72/1,086.81
  6. Step 6: Final answer
    x = 397.62

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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.