Home / 393,947.72-543,587.85-221,856.63

Finding the Fourth Proportional to 393,947.72, 543,587.85 and 221,856.63

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Solution

The fourth proportional to 393,947.72, 543,587.85 and 221,856.63 is: 306,128.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,947.72 : 543,587.85 = 221,856.63 : x
  2. Step 2: Convert to fraction form
    393,947.72/543,587.85 = 221,856.63/x
  3. Step 3: Cross multiply
    393,947.72x = 543,587.85 × 221,856.63
  4. Step 4: Simplify right side
    393,947.72x = 120,598,568,509.95
  5. Step 5: Solve for x
    x = 120,598,568,509.95/393,947.72
  6. Step 6: Final answer
    x = 306,128.36

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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.