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Finding the Fourth Proportional to 381,699.72, 526,769.46 and 220,584.20

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Solution

The fourth proportional to 381,699.72, 526,769.46 and 220,584.20 is: 304,419.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,699.72 : 526,769.46 = 220,584.20 : x
  2. Step 2: Convert to fraction form
    381,699.72/526,769.46 = 220,584.20/x
  3. Step 3: Cross multiply
    381,699.72x = 526,769.46 × 220,584.20
  4. Step 4: Simplify right side
    381,699.72x = 116,197,019,918.53
  5. Step 5: Solve for x
    x = 116,197,019,918.53/381,699.72
  6. Step 6: Final answer
    x = 304,419.98

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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.