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Finding the Fourth Proportional to 206,887.40, 310,331.10 and 205,575.20

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Solution

The fourth proportional to 206,887.40, 310,331.10 and 205,575.20 is: 308,362.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,887.40 : 310,331.10 = 205,575.20 : x
  2. Step 2: Convert to fraction form
    206,887.40/310,331.10 = 205,575.20/x
  3. Step 3: Cross multiply
    206,887.40x = 310,331.10 × 205,575.20
  4. Step 4: Simplify right side
    206,887.40x = 63,796,377,948.72
  5. Step 5: Solve for x
    x = 63,796,377,948.72/206,887.40
  6. Step 6: Final answer
    x = 308,362.80

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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.