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Finding the Fourth Proportional to 490,901.48, 677,448.06 and 276,039.64

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Solution

The fourth proportional to 490,901.48, 677,448.06 and 276,039.64 is: 380,936.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,901.48 : 677,448.06 = 276,039.64 : x
  2. Step 2: Convert to fraction form
    490,901.48/677,448.06 = 276,039.64/x
  3. Step 3: Cross multiply
    490,901.48x = 677,448.06 × 276,039.64
  4. Step 4: Simplify right side
    490,901.48x = 187,002,518,601.10
  5. Step 5: Solve for x
    x = 187,002,518,601.10/490,901.48
  6. Step 6: Final answer
    x = 380,936.96

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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.