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Finding the Fourth Proportional to 444.48, 611.82 and 391.83

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Solution

The fourth proportional to 444.48, 611.82 and 391.83 is: 539.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.48 : 611.82 = 391.83 : x
  2. Step 2: Convert to fraction form
    444.48/611.82 = 391.83/x
  3. Step 3: Cross multiply
    444.48x = 611.82 × 391.83
  4. Step 4: Simplify right side
    444.48x = 239,730.90
  5. Step 5: Solve for x
    x = 239,730.90/444.48
  6. Step 6: Final answer
    x = 539.35

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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.