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Finding the Fourth Proportional to 776.46, 1,069.44 and 579.66

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Solution

The fourth proportional to 776.46, 1,069.44 and 579.66 is: 798.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.46 : 1,069.44 = 579.66 : x
  2. Step 2: Convert to fraction form
    776.46/1,069.44 = 579.66/x
  3. Step 3: Cross multiply
    776.46x = 1,069.44 × 579.66
  4. Step 4: Simplify right side
    776.46x = 619,911.59
  5. Step 5: Solve for x
    x = 619,911.59/776.46
  6. Step 6: Final answer
    x = 798.38

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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.