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Finding the Fourth Proportional to 220,001.20, 330,001.80 and 145,205.80

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Solution

The fourth proportional to 220,001.20, 330,001.80 and 145,205.80 is: 217,808.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,001.20 : 330,001.80 = 145,205.80 : x
  2. Step 2: Convert to fraction form
    220,001.20/330,001.80 = 145,205.80/x
  3. Step 3: Cross multiply
    220,001.20x = 330,001.80 × 145,205.80
  4. Step 4: Simplify right side
    220,001.20x = 47,918,175,370.44
  5. Step 5: Solve for x
    x = 47,918,175,370.44/220,001.20
  6. Step 6: Final answer
    x = 217,808.70

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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.