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Finding the Fourth Proportional to 779.46, 1,076.19 and 569.26

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Solution

The fourth proportional to 779.46, 1,076.19 and 569.26 is: 785.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.46 : 1,076.19 = 569.26 : x
  2. Step 2: Convert to fraction form
    779.46/1,076.19 = 569.26/x
  3. Step 3: Cross multiply
    779.46x = 1,076.19 × 569.26
  4. Step 4: Simplify right side
    779.46x = 612,631.92
  5. Step 5: Solve for x
    x = 612,631.92/779.46
  6. Step 6: Final answer
    x = 785.97

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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.