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Finding the Fourth Proportional to 324,412.20, 486,531.90 and 99,772.20

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Solution

The fourth proportional to 324,412.20, 486,531.90 and 99,772.20 is: 149,631.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,412.20 : 486,531.90 = 99,772.20 : x
  2. Step 2: Convert to fraction form
    324,412.20/486,531.90 = 99,772.20/x
  3. Step 3: Cross multiply
    324,412.20x = 486,531.90 × 99,772.20
  4. Step 4: Simplify right side
    324,412.20x = 48,542,358,033.18
  5. Step 5: Solve for x
    x = 48,542,358,033.18/324,412.20
  6. Step 6: Final answer
    x = 149,631.73

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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.