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Finding the Fourth Proportional to 406,618.87, 561,135.36 and 225,333.79

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Solution

The fourth proportional to 406,618.87, 561,135.36 and 225,333.79 is: 310,961.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,618.87 : 561,135.36 = 225,333.79 : x
  2. Step 2: Convert to fraction form
    406,618.87/561,135.36 = 225,333.79/x
  3. Step 3: Cross multiply
    406,618.87x = 561,135.36 × 225,333.79
  4. Step 4: Simplify right side
    406,618.87x = 126,442,757,371.81
  5. Step 5: Solve for x
    x = 126,442,757,371.81/406,618.87
  6. Step 6: Final answer
    x = 310,961.36

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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.