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Finding the Fourth Proportional to 764.28, 1,053.68 and 607.43

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Solution

The fourth proportional to 764.28, 1,053.68 and 607.43 is: 837.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.28 : 1,053.68 = 607.43 : x
  2. Step 2: Convert to fraction form
    764.28/1,053.68 = 607.43/x
  3. Step 3: Cross multiply
    764.28x = 1,053.68 × 607.43
  4. Step 4: Simplify right side
    764.28x = 640,033.09
  5. Step 5: Solve for x
    x = 640,033.09/764.28
  6. Step 6: Final answer
    x = 837.43

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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.