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Finding the Fourth Proportional to 577.28, 797.45 and 515.09

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Solution

The fourth proportional to 577.28, 797.45 and 515.09 is: 711.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.28 : 797.45 = 515.09 : x
  2. Step 2: Convert to fraction form
    577.28/797.45 = 515.09/x
  3. Step 3: Cross multiply
    577.28x = 797.45 × 515.09
  4. Step 4: Simplify right side
    577.28x = 410,758.52
  5. Step 5: Solve for x
    x = 410,758.52/577.28
  6. Step 6: Final answer
    x = 711.54

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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.