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Finding the Fourth Proportional to 586.87, 809.78 and 338.20

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Solution

The fourth proportional to 586.87, 809.78 and 338.20 is: 466.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.87 : 809.78 = 338.20 : x
  2. Step 2: Convert to fraction form
    586.87/809.78 = 338.20/x
  3. Step 3: Cross multiply
    586.87x = 809.78 × 338.20
  4. Step 4: Simplify right side
    586.87x = 273,867.60
  5. Step 5: Solve for x
    x = 273,867.60/586.87
  6. Step 6: Final answer
    x = 466.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.