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Finding the Fourth Proportional to 351,864.20, 485,187.47 and 261,388.01

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Solution

The fourth proportional to 351,864.20, 485,187.47 and 261,388.01 is: 360,429.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,864.20 : 485,187.47 = 261,388.01 : x
  2. Step 2: Convert to fraction form
    351,864.20/485,187.47 = 261,388.01/x
  3. Step 3: Cross multiply
    351,864.20x = 485,187.47 × 261,388.01
  4. Step 4: Simplify right side
    351,864.20x = 126,822,188,146.47
  5. Step 5: Solve for x
    x = 126,822,188,146.47/351,864.20
  6. Step 6: Final answer
    x = 360,429.36

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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.