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Finding the Fourth Proportional to 270,381.76, 405,543.42 and 90,446.77

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Solution

The fourth proportional to 270,381.76, 405,543.42 and 90,446.77 is: 135,660.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,381.76 : 405,543.42 = 90,446.77 : x
  2. Step 2: Convert to fraction form
    270,381.76/405,543.42 = 90,446.77/x
  3. Step 3: Cross multiply
    270,381.76x = 405,543.42 × 90,446.77
  4. Step 4: Simplify right side
    270,381.76x = 36,680,092,940.68
  5. Step 5: Solve for x
    x = 36,680,092,940.68/270,381.76
  6. Step 6: Final answer
    x = 135,660.38

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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.