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Finding the Fourth Proportional to 1,044.45, 1,439.91 and 764.19

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Solution

The fourth proportional to 1,044.45, 1,439.91 and 764.19 is: 1,053.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.45 : 1,439.91 = 764.19 : x
  2. Step 2: Convert to fraction form
    1,044.45/1,439.91 = 764.19/x
  3. Step 3: Cross multiply
    1,044.45x = 1,439.91 × 764.19
  4. Step 4: Simplify right side
    1,044.45x = 1,100,364.82
  5. Step 5: Solve for x
    x = 1,100,364.82/1,044.45
  6. Step 6: Final answer
    x = 1,053.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.