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Finding the Fourth Proportional to 381,555.30, 526,545.90 and 211,789.02

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Solution

The fourth proportional to 381,555.30, 526,545.90 and 211,789.02 is: 292,268.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,555.30 : 526,545.90 = 211,789.02 : x
  2. Step 2: Convert to fraction form
    381,555.30/526,545.90 = 211,789.02/x
  3. Step 3: Cross multiply
    381,555.30x = 526,545.90 × 211,789.02
  4. Step 4: Simplify right side
    381,555.30x = 111,516,640,146.02
  5. Step 5: Solve for x
    x = 111,516,640,146.02/381,555.30
  6. Step 6: Final answer
    x = 292,268.62

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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.