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Finding the Fourth Proportional to 519.48, 774.19 and 515.16

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Solution

The fourth proportional to 519.48, 774.19 and 515.16 is: 767.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.48 : 774.19 = 515.16 : x
  2. Step 2: Convert to fraction form
    519.48/774.19 = 515.16/x
  3. Step 3: Cross multiply
    519.48x = 774.19 × 515.16
  4. Step 4: Simplify right side
    519.48x = 398,832.36
  5. Step 5: Solve for x
    x = 398,832.36/519.48
  6. Step 6: Final answer
    x = 767.75

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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.