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Finding the Fourth Proportional to 486,757.85, 730,137.35 and 126,928.40

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Solution

The fourth proportional to 486,757.85, 730,137.35 and 126,928.40 is: 190,392.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,757.85 : 730,137.35 = 126,928.40 : x
  2. Step 2: Convert to fraction form
    486,757.85/730,137.35 = 126,928.40/x
  3. Step 3: Cross multiply
    486,757.85x = 730,137.35 × 126,928.40
  4. Step 4: Simplify right side
    486,757.85x = 92,675,161,330.41
  5. Step 5: Solve for x
    x = 92,675,161,330.41/486,757.85
  6. Step 6: Final answer
    x = 190,392.74

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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.