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Finding the Fourth Proportional to 206,695.80, 310,043.70 and 180,451.80

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Solution

The fourth proportional to 206,695.80, 310,043.70 and 180,451.80 is: 270,677.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,695.80 : 310,043.70 = 180,451.80 : x
  2. Step 2: Convert to fraction form
    206,695.80/310,043.70 = 180,451.80/x
  3. Step 3: Cross multiply
    206,695.80x = 310,043.70 × 180,451.80
  4. Step 4: Simplify right side
    206,695.80x = 55,947,943,743.66
  5. Step 5: Solve for x
    x = 55,947,943,743.66/206,695.80
  6. Step 6: Final answer
    x = 270,677.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.