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Finding the Fourth Proportional to 356,309.48, 491,520.69 and 220,299.95

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Solution

The fourth proportional to 356,309.48, 491,520.69 and 220,299.95 is: 303,898.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,309.48 : 491,520.69 = 220,299.95 : x
  2. Step 2: Convert to fraction form
    356,309.48/491,520.69 = 220,299.95/x
  3. Step 3: Cross multiply
    356,309.48x = 491,520.69 × 220,299.95
  4. Step 4: Simplify right side
    356,309.48x = 108,281,984,659.77
  5. Step 5: Solve for x
    x = 108,281,984,659.77/356,309.48
  6. Step 6: Final answer
    x = 303,898.69

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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.