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Finding the Fourth Proportional to 689,352.72, 951,395.40 and 387,605.04

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Solution

The fourth proportional to 689,352.72, 951,395.40 and 387,605.04 is: 534,944.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,352.72 : 951,395.40 = 387,605.04 : x
  2. Step 2: Convert to fraction form
    689,352.72/951,395.40 = 387,605.04/x
  3. Step 3: Cross multiply
    689,352.72x = 951,395.40 × 387,605.04
  4. Step 4: Simplify right side
    689,352.72x = 368,765,652,072.82
  5. Step 5: Solve for x
    x = 368,765,652,072.82/689,352.72
  6. Step 6: Final answer
    x = 534,944.80

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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.