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Finding the Fourth Proportional to 1,236.71, 1,854.61 and 414.79

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Solution

The fourth proportional to 1,236.71, 1,854.61 and 414.79 is: 622.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.71 : 1,854.61 = 414.79 : x
  2. Step 2: Convert to fraction form
    1,236.71/1,854.61 = 414.79/x
  3. Step 3: Cross multiply
    1,236.71x = 1,854.61 × 414.79
  4. Step 4: Simplify right side
    1,236.71x = 769,276.52
  5. Step 5: Solve for x
    x = 769,276.52/1,236.71
  6. Step 6: Final answer
    x = 622.03

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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.