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Finding the Fourth Proportional to 381,345.80, 526,126.85 and 217,885.02

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Solution

The fourth proportional to 381,345.80, 526,126.85 and 217,885.02 is: 300,606.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,345.80 : 526,126.85 = 217,885.02 : x
  2. Step 2: Convert to fraction form
    381,345.80/526,126.85 = 217,885.02/x
  3. Step 3: Cross multiply
    381,345.80x = 526,126.85 × 217,885.02
  4. Step 4: Simplify right side
    381,345.80x = 114,635,159,234.79
  5. Step 5: Solve for x
    x = 114,635,159,234.79/381,345.80
  6. Step 6: Final answer
    x = 300,606.85

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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.