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Finding the Fourth Proportional to 1,243.91, 1,865.86 and 474.41

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Solution

The fourth proportional to 1,243.91, 1,865.86 and 474.41 is: 711.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.91 : 1,865.86 = 474.41 : x
  2. Step 2: Convert to fraction form
    1,243.91/1,865.86 = 474.41/x
  3. Step 3: Cross multiply
    1,243.91x = 1,865.86 × 474.41
  4. Step 4: Simplify right side
    1,243.91x = 885,182.64
  5. Step 5: Solve for x
    x = 885,182.64/1,243.91
  6. Step 6: Final answer
    x = 711.61

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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.