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Finding the Fourth Proportional to 689,644.89, 951,695.01 and 399,268.70

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Solution

The fourth proportional to 689,644.89, 951,695.01 and 399,268.70 is: 550,982.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,644.89 : 951,695.01 = 399,268.70 : x
  2. Step 2: Convert to fraction form
    689,644.89/951,695.01 = 399,268.70/x
  3. Step 3: Cross multiply
    689,644.89x = 951,695.01 × 399,268.70
  4. Step 4: Simplify right side
    689,644.89x = 379,982,024,680.71
  5. Step 5: Solve for x
    x = 379,982,024,680.71/689,644.89
  6. Step 6: Final answer
    x = 550,982.15

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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.