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Finding the Fourth Proportional to 486,344.50, 729,519.99 and 153,920.50

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Solution

The fourth proportional to 486,344.50, 729,519.99 and 153,920.50 is: 230,881.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,344.50 : 729,519.99 = 153,920.50 : x
  2. Step 2: Convert to fraction form
    486,344.50/729,519.99 = 153,920.50/x
  3. Step 3: Cross multiply
    486,344.50x = 729,519.99 × 153,920.50
  4. Step 4: Simplify right side
    486,344.50x = 112,288,081,620.80
  5. Step 5: Solve for x
    x = 112,288,081,620.80/486,344.50
  6. Step 6: Final answer
    x = 230,881.78

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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.