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Finding the Fourth Proportional to 643,879.12, 965,227.38 and 222,860.56

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Solution

The fourth proportional to 643,879.12, 965,227.38 and 222,860.56 is: 334,086.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,879.12 : 965,227.38 = 222,860.56 : x
  2. Step 2: Convert to fraction form
    643,879.12/965,227.38 = 222,860.56/x
  3. Step 3: Cross multiply
    643,879.12x = 965,227.38 × 222,860.56
  4. Step 4: Simplify right side
    643,879.12x = 215,111,114,434.13
  5. Step 5: Solve for x
    x = 215,111,114,434.13/643,879.12
  6. Step 6: Final answer
    x = 334,086.18

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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.