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Finding the Fourth Proportional to 1,019.31, 1,528.97 and 249.81

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Solution

The fourth proportional to 1,019.31, 1,528.97 and 249.81 is: 374.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.31 : 1,528.97 = 249.81 : x
  2. Step 2: Convert to fraction form
    1,019.31/1,528.97 = 249.81/x
  3. Step 3: Cross multiply
    1,019.31x = 1,528.97 × 249.81
  4. Step 4: Simplify right side
    1,019.31x = 381,952.00
  5. Step 5: Solve for x
    x = 381,952.00/1,019.31
  6. Step 6: Final answer
    x = 374.72

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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.