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Finding the Fourth Proportional to 483.80, 726.08 and 209.99

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Solution

The fourth proportional to 483.80, 726.08 and 209.99 is: 315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.80 : 726.08 = 209.99 : x
  2. Step 2: Convert to fraction form
    483.80/726.08 = 209.99/x
  3. Step 3: Cross multiply
    483.80x = 726.08 × 209.99
  4. Step 4: Simplify right side
    483.80x = 152,470.30
  5. Step 5: Solve for x
    x = 152,470.30/483.80
  6. Step 6: Final answer
    x = 315.15

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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.