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Finding the Fourth Proportional to 521,906.30, 720,218.49 and 307,060.19

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Solution

The fourth proportional to 521,906.30, 720,218.49 and 307,060.19 is: 423,735.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,906.30 : 720,218.49 = 307,060.19 : x
  2. Step 2: Convert to fraction form
    521,906.30/720,218.49 = 307,060.19/x
  3. Step 3: Cross multiply
    521,906.30x = 720,218.49 × 307,060.19
  4. Step 4: Simplify right side
    521,906.30x = 221,150,426,380.91
  5. Step 5: Solve for x
    x = 221,150,426,380.91/521,906.30
  6. Step 6: Final answer
    x = 423,735.88

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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.