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Finding the Fourth Proportional to 258,902.38, 388,446.72 and 90,447.49

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Solution

The fourth proportional to 258,902.38, 388,446.72 and 90,447.49 is: 135,703.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,902.38 : 388,446.72 = 90,447.49 : x
  2. Step 2: Convert to fraction form
    258,902.38/388,446.72 = 90,447.49/x
  3. Step 3: Cross multiply
    258,902.38x = 388,446.72 × 90,447.49
  4. Step 4: Simplify right side
    258,902.38x = 35,134,030,822.73
  5. Step 5: Solve for x
    x = 35,134,030,822.73/258,902.38
  6. Step 6: Final answer
    x = 135,703.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.