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Finding the Fourth Proportional to 621.76, 931.77 and 484.18

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Solution

The fourth proportional to 621.76, 931.77 and 484.18 is: 725.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.76 : 931.77 = 484.18 : x
  2. Step 2: Convert to fraction form
    621.76/931.77 = 484.18/x
  3. Step 3: Cross multiply
    621.76x = 931.77 × 484.18
  4. Step 4: Simplify right side
    621.76x = 451,144.40
  5. Step 5: Solve for x
    x = 451,144.40/621.76
  6. Step 6: Final answer
    x = 725.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.