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Finding the Fourth Proportional to 490,785.84, 677,274.66 and 272,989.80

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Solution

The fourth proportional to 490,785.84, 677,274.66 and 272,989.80 is: 376,720.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,785.84 : 677,274.66 = 272,989.80 : x
  2. Step 2: Convert to fraction form
    490,785.84/677,274.66 = 272,989.80/x
  3. Step 3: Cross multiply
    490,785.84x = 677,274.66 × 272,989.80
  4. Step 4: Simplify right side
    490,785.84x = 184,889,073,978.47
  5. Step 5: Solve for x
    x = 184,889,073,978.47/490,785.84
  6. Step 6: Final answer
    x = 376,720.47

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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.