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Finding the Fourth Proportional to 518.51, 773.71 and 515.48

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Solution

The fourth proportional to 518.51, 773.71 and 515.48 is: 769.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.51 : 773.71 = 515.48 : x
  2. Step 2: Convert to fraction form
    518.51/773.71 = 515.48/x
  3. Step 3: Cross multiply
    518.51x = 773.71 × 515.48
  4. Step 4: Simplify right side
    518.51x = 398,826.87
  5. Step 5: Solve for x
    x = 398,826.87/518.51
  6. Step 6: Final answer
    x = 769.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.