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Finding the Fourth Proportional to 393,649.20, 543,234.60 and 223,873.20

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Solution

The fourth proportional to 393,649.20, 543,234.60 and 223,873.20 is: 308,944.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,649.20 : 543,234.60 = 223,873.20 : x
  2. Step 2: Convert to fraction form
    393,649.20/543,234.60 = 223,873.20/x
  3. Step 3: Cross multiply
    393,649.20x = 543,234.60 × 223,873.20
  4. Step 4: Simplify right side
    393,649.20x = 121,615,668,252.72
  5. Step 5: Solve for x
    x = 121,615,668,252.72/393,649.20
  6. Step 6: Final answer
    x = 308,944.28

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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.