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Finding the Fourth Proportional to 484,238.84, 667,785.21 and 320,635.76

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Solution

The fourth proportional to 484,238.84, 667,785.21 and 320,635.76 is: 442,169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,238.84 : 667,785.21 = 320,635.76 : x
  2. Step 2: Convert to fraction form
    484,238.84/667,785.21 = 320,635.76/x
  3. Step 3: Cross multiply
    484,238.84x = 667,785.21 × 320,635.76
  4. Step 4: Simplify right side
    484,238.84x = 214,115,814,986.18
  5. Step 5: Solve for x
    x = 214,115,814,986.18/484,238.84
  6. Step 6: Final answer
    x = 442,169.85

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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.