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Finding the Fourth Proportional to 635,212.80, 951,944.40 and 421,372.80

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Solution

The fourth proportional to 635,212.80, 951,944.40 and 421,372.80 is: 631,478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,212.80 : 951,944.40 = 421,372.80 : x
  2. Step 2: Convert to fraction form
    635,212.80/951,944.40 = 421,372.80/x
  3. Step 3: Cross multiply
    635,212.80x = 951,944.40 × 421,372.80
  4. Step 4: Simplify right side
    635,212.80x = 401,123,477,272.32
  5. Step 5: Solve for x
    x = 401,123,477,272.32/635,212.80
  6. Step 6: Final answer
    x = 631,478.90

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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.