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Finding the Fourth Proportional to 587.94, 811.42 and 447.80

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Solution

The fourth proportional to 587.94, 811.42 and 447.80 is: 618.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.94 : 811.42 = 447.80 : x
  2. Step 2: Convert to fraction form
    587.94/811.42 = 447.80/x
  3. Step 3: Cross multiply
    587.94x = 811.42 × 447.80
  4. Step 4: Simplify right side
    587.94x = 363,353.88
  5. Step 5: Solve for x
    x = 363,353.88/587.94
  6. Step 6: Final answer
    x = 618.01

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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.