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Finding the Fourth Proportional to 381,315.70, 526,262.36 and 220,170.40

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Solution

The fourth proportional to 381,315.70, 526,262.36 and 220,170.40 is: 303,862.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,315.70 : 526,262.36 = 220,170.40 : x
  2. Step 2: Convert to fraction form
    381,315.70/526,262.36 = 220,170.40/x
  3. Step 3: Cross multiply
    381,315.70x = 526,262.36 × 220,170.40
  4. Step 4: Simplify right side
    381,315.70x = 115,867,393,755.72
  5. Step 5: Solve for x
    x = 115,867,393,755.72/381,315.70
  6. Step 6: Final answer
    x = 303,862.11

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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.