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Finding the Fourth Proportional to 486,429.59, 729,660.78 and 131,446.68

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Solution

The fourth proportional to 486,429.59, 729,660.78 and 131,446.68 is: 197,174.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,429.59 : 729,660.78 = 131,446.68 : x
  2. Step 2: Convert to fraction form
    486,429.59/729,660.78 = 131,446.68/x
  3. Step 3: Cross multiply
    486,429.59x = 729,660.78 × 131,446.68
  4. Step 4: Simplify right side
    486,429.59x = 95,911,487,057.21
  5. Step 5: Solve for x
    x = 95,911,487,057.21/486,429.59
  6. Step 6: Final answer
    x = 197,174.45

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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.