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Finding the Fourth Proportional to 381,866.12, 526,916.64 and 220,690.04

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Solution

The fourth proportional to 381,866.12, 526,916.64 and 220,690.04 is: 304,518.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,866.12 : 526,916.64 = 220,690.04 : x
  2. Step 2: Convert to fraction form
    381,866.12/526,916.64 = 220,690.04/x
  3. Step 3: Cross multiply
    381,866.12x = 526,916.64 × 220,690.04
  4. Step 4: Simplify right side
    381,866.12x = 116,285,251,723.68
  5. Step 5: Solve for x
    x = 116,285,251,723.68/381,866.12
  6. Step 6: Final answer
    x = 304,518.38

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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.