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Finding the Fourth Proportional to 652.74, 979.11 and 380.73

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Solution

The fourth proportional to 652.74, 979.11 and 380.73 is: 571.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.74 : 979.11 = 380.73 : x
  2. Step 2: Convert to fraction form
    652.74/979.11 = 380.73/x
  3. Step 3: Cross multiply
    652.74x = 979.11 × 380.73
  4. Step 4: Simplify right side
    652.74x = 372,776.55
  5. Step 5: Solve for x
    x = 372,776.55/652.74
  6. Step 6: Final answer
    x = 571.10

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Double scale
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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.