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Finding the Fourth Proportional to 219,906.30, 308,490.90 and 219,906.30

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Solution

The fourth proportional to 219,906.30, 308,490.90 and 219,906.30 is: 308,490.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,906.30 : 308,490.90 = 219,906.30 : x
  2. Step 2: Convert to fraction form
    219,906.30/308,490.90 = 219,906.30/x
  3. Step 3: Cross multiply
    219,906.30x = 308,490.90 × 219,906.30
  4. Step 4: Simplify right side
    219,906.30x = 67,839,092,402.67
  5. Step 5: Solve for x
    x = 67,839,092,402.67/219,906.30
  6. Step 6: Final answer
    x = 308,490.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.