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Finding the Fourth Proportional to 767.92, 1,059.24 and 628.24

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Solution

The fourth proportional to 767.92, 1,059.24 and 628.24 is: 866.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.92 : 1,059.24 = 628.24 : x
  2. Step 2: Convert to fraction form
    767.92/1,059.24 = 628.24/x
  3. Step 3: Cross multiply
    767.92x = 1,059.24 × 628.24
  4. Step 4: Simplify right side
    767.92x = 665,456.94
  5. Step 5: Solve for x
    x = 665,456.94/767.92
  6. Step 6: Final answer
    x = 866.57

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1.5x scale

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.