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Finding the Fourth Proportional to 381,866.91, 526,917.71 and 220,690.78

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Solution

The fourth proportional to 381,866.91, 526,917.71 and 220,690.78 is: 304,519.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,866.91 : 526,917.71 = 220,690.78 : x
  2. Step 2: Convert to fraction form
    381,866.91/526,917.71 = 220,690.78/x
  3. Step 3: Cross multiply
    381,866.91x = 526,917.71 × 220,690.78
  4. Step 4: Simplify right side
    381,866.91x = 116,285,878,408.76
  5. Step 5: Solve for x
    x = 116,285,878,408.76/381,866.91
  6. Step 6: Final answer
    x = 304,519.39

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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.