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Finding the Fourth Proportional to 381,218.46, 526,079.79 and 217,872.24

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Solution

The fourth proportional to 381,218.46, 526,079.79 and 217,872.24 is: 300,662.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,218.46 : 526,079.79 = 217,872.24 : x
  2. Step 2: Convert to fraction form
    381,218.46/526,079.79 = 217,872.24/x
  3. Step 3: Cross multiply
    381,218.46x = 526,079.79 × 217,872.24
  4. Step 4: Simplify right side
    381,218.46x = 114,618,182,266.03
  5. Step 5: Solve for x
    x = 114,618,182,266.03/381,218.46
  6. Step 6: Final answer
    x = 300,662.73

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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.