Home / 330,195.20-455,498.88-209,132.80

Finding the Fourth Proportional to 330,195.20, 455,498.88 and 209,132.80

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Solution

The fourth proportional to 330,195.20, 455,498.88 and 209,132.80 is: 288,495.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,195.20 : 455,498.88 = 209,132.80 : x
  2. Step 2: Convert to fraction form
    330,195.20/455,498.88 = 209,132.80/x
  3. Step 3: Cross multiply
    330,195.20x = 455,498.88 × 209,132.80
  4. Step 4: Simplify right side
    330,195.20x = 95,259,756,171.26
  5. Step 5: Solve for x
    x = 95,259,756,171.26/330,195.20
  6. Step 6: Final answer
    x = 288,495.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.