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Finding the Fourth Proportional to 316,391.67, 436,418.96 and 220,863.51

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Solution

The fourth proportional to 316,391.67, 436,418.96 and 220,863.51 is: 304,650.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,391.67 : 436,418.96 = 220,863.51 : x
  2. Step 2: Convert to fraction form
    316,391.67/436,418.96 = 220,863.51/x
  3. Step 3: Cross multiply
    316,391.67x = 436,418.96 × 220,863.51
  4. Step 4: Simplify right side
    316,391.67x = 96,389,022,231.83
  5. Step 5: Solve for x
    x = 96,389,022,231.83/316,391.67
  6. Step 6: Final answer
    x = 304,650.95

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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.