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Finding the Fourth Proportional to 208,490.44, 287,718.23 and 112,998.73

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Solution

The fourth proportional to 208,490.44, 287,718.23 and 112,998.73 is: 155,939.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,490.44 : 287,718.23 = 112,998.73 : x
  2. Step 2: Convert to fraction form
    208,490.44/287,718.23 = 112,998.73/x
  3. Step 3: Cross multiply
    208,490.44x = 287,718.23 × 112,998.73
  4. Step 4: Simplify right side
    208,490.44x = 32,511,794,587.85
  5. Step 5: Solve for x
    x = 32,511,794,587.85/208,490.44
  6. Step 6: Final answer
    x = 155,939.02

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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.