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Finding the Fourth Proportional to 486,542.80, 729,812.40 and 131,556.78

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Solution

The fourth proportional to 486,542.80, 729,812.40 and 131,556.78 is: 197,334.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,542.80 : 729,812.40 = 131,556.78 : x
  2. Step 2: Convert to fraction form
    486,542.80/729,812.40 = 131,556.78/x
  3. Step 3: Cross multiply
    486,542.80x = 729,812.40 × 131,556.78
  4. Step 4: Simplify right side
    486,542.80x = 96,011,769,348.07
  5. Step 5: Solve for x
    x = 96,011,769,348.07/486,542.80
  6. Step 6: Final answer
    x = 197,334.68

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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.