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Finding the Fourth Proportional to 621.05, 930.96 and 296.64

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Solution

The fourth proportional to 621.05, 930.96 and 296.64 is: 444.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.05 : 930.96 = 296.64 : x
  2. Step 2: Convert to fraction form
    621.05/930.96 = 296.64/x
  3. Step 3: Cross multiply
    621.05x = 930.96 × 296.64
  4. Step 4: Simplify right side
    621.05x = 276,162.30
  5. Step 5: Solve for x
    x = 276,162.30/621.05
  6. Step 6: Final answer
    x = 444.67

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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.