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Finding the Fourth Proportional to 621.19, 931.33 and 296.79

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Solution

The fourth proportional to 621.19, 931.33 and 296.79 is: 444.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.19 : 931.33 = 296.79 : x
  2. Step 2: Convert to fraction form
    621.19/931.33 = 296.79/x
  3. Step 3: Cross multiply
    621.19x = 931.33 × 296.79
  4. Step 4: Simplify right side
    621.19x = 276,403.29
  5. Step 5: Solve for x
    x = 276,403.29/621.19
  6. Step 6: Final answer
    x = 444.96

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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.