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Finding the Fourth Proportional to 689,530.16, 951,638.28 and 387,722

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Solution

The fourth proportional to 689,530.16, 951,638.28 and 387,722 is: 535,105.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,530.16 : 951,638.28 = 387,722 : x
  2. Step 2: Convert to fraction form
    689,530.16/951,638.28 = 387,722/x
  3. Step 3: Cross multiply
    689,530.16x = 951,638.28 × 387,722
  4. Step 4: Simplify right side
    689,530.16x = 368,971,097,198.16
  5. Step 5: Solve for x
    x = 368,971,097,198.16/689,530.16
  6. Step 6: Final answer
    x = 535,105.09

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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.