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Finding the Fourth Proportional to 621.52, 936.49 and 515.68

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Solution

The fourth proportional to 621.52, 936.49 and 515.68 is: 777.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.52 : 936.49 = 515.68 : x
  2. Step 2: Convert to fraction form
    621.52/936.49 = 515.68/x
  3. Step 3: Cross multiply
    621.52x = 936.49 × 515.68
  4. Step 4: Simplify right side
    621.52x = 482,929.16
  5. Step 5: Solve for x
    x = 482,929.16/621.52
  6. Step 6: Final answer
    x = 777.01

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.