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Finding the Fourth Proportional to 220,486.59, 330,622.90 and 129,326.90

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Solution

The fourth proportional to 220,486.59, 330,622.90 and 129,326.90 is: 193,927.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,486.59 : 330,622.90 = 129,326.90 : x
  2. Step 2: Convert to fraction form
    220,486.59/330,622.90 = 129,326.90/x
  3. Step 3: Cross multiply
    220,486.59x = 330,622.90 × 129,326.90
  4. Step 4: Simplify right side
    220,486.59x = 42,758,432,749.58
  5. Step 5: Solve for x
    x = 42,758,432,749.58/220,486.59
  6. Step 6: Final answer
    x = 193,927.59

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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.