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Finding the Fourth Proportional to 486,961.40, 730,660.80 and 220,584.80

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Solution

The fourth proportional to 486,961.40, 730,660.80 and 220,584.80 is: 330,976.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,961.40 : 730,660.80 = 220,584.80 : x
  2. Step 2: Convert to fraction form
    486,961.40/730,660.80 = 220,584.80/x
  3. Step 3: Cross multiply
    486,961.40x = 730,660.80 × 220,584.80
  4. Step 4: Simplify right side
    486,961.40x = 161,172,666,435.84
  5. Step 5: Solve for x
    x = 161,172,666,435.84/486,961.40
  6. Step 6: Final answer
    x = 330,976.27

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1.5x scale

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.