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Finding the Fourth Proportional to 356,305.71, 491,515.53 and 220,296.18

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Solution

The fourth proportional to 356,305.71, 491,515.53 and 220,296.18 is: 303,893.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,305.71 : 491,515.53 = 220,296.18 : x
  2. Step 2: Convert to fraction form
    356,305.71/491,515.53 = 220,296.18/x
  3. Step 3: Cross multiply
    356,305.71x = 491,515.53 × 220,296.18
  4. Step 4: Simplify right side
    356,305.71x = 108,278,993,669.68
  5. Step 5: Solve for x
    x = 108,278,993,669.68/356,305.71
  6. Step 6: Final answer
    x = 303,893.51

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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.