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Finding the Fourth Proportional to 689,614.25, 951,652.76 and 399,238.12

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Solution

The fourth proportional to 689,614.25, 951,652.76 and 399,238.12 is: 550,939.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,614.25 : 951,652.76 = 399,238.12 : x
  2. Step 2: Convert to fraction form
    689,614.25/951,652.76 = 399,238.12/x
  3. Step 3: Cross multiply
    689,614.25x = 951,652.76 × 399,238.12
  4. Step 4: Simplify right side
    689,614.25x = 379,936,056,434.92
  5. Step 5: Solve for x
    x = 379,936,056,434.92/689,614.25
  6. Step 6: Final answer
    x = 550,939.97

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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.