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Finding the Fourth Proportional to 621.20, 936.20 and 591.92

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Solution

The fourth proportional to 621.20, 936.20 and 591.92 is: 892.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.20 : 936.20 = 591.92 : x
  2. Step 2: Convert to fraction form
    621.20/936.20 = 591.92/x
  3. Step 3: Cross multiply
    621.20x = 936.20 × 591.92
  4. Step 4: Simplify right side
    621.20x = 554,155.50
  5. Step 5: Solve for x
    x = 554,155.50/621.20
  6. Step 6: Final answer
    x = 892.07

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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.