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Finding the Fourth Proportional to 689,354.72, 951,398.16 and 387,607.04

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Solution

The fourth proportional to 689,354.72, 951,398.16 and 387,607.04 is: 534,947.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,354.72 : 951,398.16 = 387,607.04 : x
  2. Step 2: Convert to fraction form
    689,354.72/951,398.16 = 387,607.04/x
  3. Step 3: Cross multiply
    689,354.72x = 951,398.16 × 387,607.04
  4. Step 4: Simplify right side
    689,354.72x = 368,768,624,659.05
  5. Step 5: Solve for x
    x = 368,768,624,659.05/689,354.72
  6. Step 6: Final answer
    x = 534,947.56

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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.