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Finding the Fourth Proportional to 490,717.89, 677,186.87 and 272,928.56

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Solution

The fourth proportional to 490,717.89, 677,186.87 and 272,928.56 is: 376,639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,717.89 : 677,186.87 = 272,928.56 : x
  2. Step 2: Convert to fraction form
    490,717.89/677,186.87 = 272,928.56/x
  3. Step 3: Cross multiply
    490,717.89x = 677,186.87 × 272,928.56
  4. Step 4: Simplify right side
    490,717.89x = 184,823,632,529.43
  5. Step 5: Solve for x
    x = 184,823,632,529.43/490,717.89
  6. Step 6: Final answer
    x = 376,639.28

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1.5x scale

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.