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Finding the Fourth Proportional to 1,015.43, 1,523.22 and 285.06

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Solution

The fourth proportional to 1,015.43, 1,523.22 and 285.06 is: 427.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.43 : 1,523.22 = 285.06 : x
  2. Step 2: Convert to fraction form
    1,015.43/1,523.22 = 285.06/x
  3. Step 3: Cross multiply
    1,015.43x = 1,523.22 × 285.06
  4. Step 4: Simplify right side
    1,015.43x = 434,209.09
  5. Step 5: Solve for x
    x = 434,209.09/1,015.43
  6. Step 6: Final answer
    x = 427.61

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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.