Home / 399,736.32-551,634.81-218,449.31

Finding the Fourth Proportional to 399,736.32, 551,634.81 and 218,449.31

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Solution

The fourth proportional to 399,736.32, 551,634.81 and 218,449.31 is: 301,459.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,736.32 : 551,634.81 = 218,449.31 : x
  2. Step 2: Convert to fraction form
    399,736.32/551,634.81 = 218,449.31/x
  3. Step 3: Cross multiply
    399,736.32x = 551,634.81 × 218,449.31
  4. Step 4: Simplify right side
    399,736.32x = 120,504,240,039.12
  5. Step 5: Solve for x
    x = 120,504,240,039.12/399,736.32
  6. Step 6: Final answer
    x = 301,459.32

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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.