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Finding the Fourth Proportional to 547,716.72, 755,710.92 and 321,318.48

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Solution

The fourth proportional to 547,716.72, 755,710.92 and 321,318.48 is: 443,338.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,716.72 : 755,710.92 = 321,318.48 : x
  2. Step 2: Convert to fraction form
    547,716.72/755,710.92 = 321,318.48/x
  3. Step 3: Cross multiply
    547,716.72x = 755,710.92 × 321,318.48
  4. Step 4: Simplify right side
    547,716.72x = 242,823,884,133.80
  5. Step 5: Solve for x
    x = 242,823,884,133.80/547,716.72
  6. Step 6: Final answer
    x = 443,338.45

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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.