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Finding the Fourth Proportional to 399,048.39, 550,698.48 and 217,772.03

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Solution

The fourth proportional to 399,048.39, 550,698.48 and 217,772.03 is: 300,531.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,048.39 : 550,698.48 = 217,772.03 : x
  2. Step 2: Convert to fraction form
    399,048.39/550,698.48 = 217,772.03/x
  3. Step 3: Cross multiply
    399,048.39x = 550,698.48 × 217,772.03
  4. Step 4: Simplify right side
    399,048.39x = 119,926,725,907.51
  5. Step 5: Solve for x
    x = 119,926,725,907.51/399,048.39
  6. Step 6: Final answer
    x = 300,531.79

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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.