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Finding the Fourth Proportional to 213,418.53, 318,182.65 and 207,965.61

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Solution

The fourth proportional to 213,418.53, 318,182.65 and 207,965.61 is: 310,052.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,418.53 : 318,182.65 = 207,965.61 : x
  2. Step 2: Convert to fraction form
    213,418.53/318,182.65 = 207,965.61/x
  3. Step 3: Cross multiply
    213,418.53x = 318,182.65 × 207,965.61
  4. Step 4: Simplify right side
    213,418.53x = 66,171,048,378.75
  5. Step 5: Solve for x
    x = 66,171,048,378.75/213,418.53
  6. Step 6: Final answer
    x = 310,052.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.