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Finding the Fourth Proportional to 220,145.80, 330,218.70 and 218,763.40

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Solution

The fourth proportional to 220,145.80, 330,218.70 and 218,763.40 is: 328,145.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,145.80 : 330,218.70 = 218,763.40 : x
  2. Step 2: Convert to fraction form
    220,145.80/330,218.70 = 218,763.40/x
  3. Step 3: Cross multiply
    220,145.80x = 330,218.70 × 218,763.40
  4. Step 4: Simplify right side
    220,145.80x = 72,239,765,555.58
  5. Step 5: Solve for x
    x = 72,239,765,555.58/220,145.80
  6. Step 6: Final answer
    x = 328,145.10

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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.