Home / 486,976.80-729,968.40-329,221.20

Finding the Fourth Proportional to 486,976.80, 729,968.40 and 329,221.20

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Solution

The fourth proportional to 486,976.80, 729,968.40 and 329,221.20 is: 493,495.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,976.80 : 729,968.40 = 329,221.20 : x
  2. Step 2: Convert to fraction form
    486,976.80/729,968.40 = 329,221.20/x
  3. Step 3: Cross multiply
    486,976.80x = 729,968.40 × 329,221.20
  4. Step 4: Simplify right side
    486,976.80x = 240,321,072,610.08
  5. Step 5: Solve for x
    x = 240,321,072,610.08/486,976.80
  6. Step 6: Final answer
    x = 493,495.94

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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.