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Finding the Fourth Proportional to 499,448.28, 689,203.44 and 305,888.52

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Solution

The fourth proportional to 499,448.28, 689,203.44 and 305,888.52 is: 422,104.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,448.28 : 689,203.44 = 305,888.52 : x
  2. Step 2: Convert to fraction form
    499,448.28/689,203.44 = 305,888.52/x
  3. Step 3: Cross multiply
    499,448.28x = 689,203.44 × 305,888.52
  4. Step 4: Simplify right side
    499,448.28x = 210,819,420,240.51
  5. Step 5: Solve for x
    x = 210,819,420,240.51/499,448.28
  6. Step 6: Final answer
    x = 422,104.61

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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.