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Finding the Fourth Proportional to 324,564.55, 486,902.40 and 99,920.56

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Solution

The fourth proportional to 324,564.55, 486,902.40 and 99,920.56 is: 149,897.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,564.55 : 486,902.40 = 99,920.56 : x
  2. Step 2: Convert to fraction form
    324,564.55/486,902.40 = 99,920.56/x
  3. Step 3: Cross multiply
    324,564.55x = 486,902.40 × 99,920.56
  4. Step 4: Simplify right side
    324,564.55x = 48,651,560,473.34
  5. Step 5: Solve for x
    x = 48,651,560,473.34/324,564.55
  6. Step 6: Final answer
    x = 149,897.95

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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.