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Finding the Fourth Proportional to 776.52, 1,072.62 and 579.69

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Solution

The fourth proportional to 776.52, 1,072.62 and 579.69 is: 800.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.52 : 1,072.62 = 579.69 : x
  2. Step 2: Convert to fraction form
    776.52/1,072.62 = 579.69/x
  3. Step 3: Cross multiply
    776.52x = 1,072.62 × 579.69
  4. Step 4: Simplify right side
    776.52x = 621,787.09
  5. Step 5: Solve for x
    x = 621,787.09/776.52
  6. Step 6: Final answer
    x = 800.74

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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.