Home / 393,578.09-543,165.23-221,512.52

Finding the Fourth Proportional to 393,578.09, 543,165.23 and 221,512.52

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Solution

The fourth proportional to 393,578.09, 543,165.23 and 221,512.52 is: 305,702.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,578.09 : 543,165.23 = 221,512.52 : x
  2. Step 2: Convert to fraction form
    393,578.09/543,165.23 = 221,512.52/x
  3. Step 3: Cross multiply
    393,578.09x = 543,165.23 × 221,512.52
  4. Step 4: Simplify right side
    393,578.09x = 120,317,895,050.29
  5. Step 5: Solve for x
    x = 120,317,895,050.29/393,578.09
  6. Step 6: Final answer
    x = 305,702.73

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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.