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Finding the Fourth Proportional to 486,757.48, 730,136.78 and 126,928.02

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Solution

The fourth proportional to 486,757.48, 730,136.78 and 126,928.02 is: 190,392.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,757.48 : 730,136.78 = 126,928.02 : x
  2. Step 2: Convert to fraction form
    486,757.48/730,136.78 = 126,928.02/x
  3. Step 3: Cross multiply
    486,757.48x = 730,136.78 × 126,928.02
  4. Step 4: Simplify right side
    486,757.48x = 92,674,813,393.88
  5. Step 5: Solve for x
    x = 92,674,813,393.88/486,757.48
  6. Step 6: Final answer
    x = 190,392.17

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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.