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Finding the Fourth Proportional to 483,964.40, 725,428.20 and 217,679.60

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Solution

The fourth proportional to 483,964.40, 725,428.20 and 217,679.60 is: 326,286.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,964.40 : 725,428.20 = 217,679.60 : x
  2. Step 2: Convert to fraction form
    483,964.40/725,428.20 = 217,679.60/x
  3. Step 3: Cross multiply
    483,964.40x = 725,428.20 × 217,679.60
  4. Step 4: Simplify right side
    483,964.40x = 157,910,920,404.72
  5. Step 5: Solve for x
    x = 157,910,920,404.72/483,964.40
  6. Step 6: Final answer
    x = 326,286.23

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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.