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Finding the Fourth Proportional to 386,467.80, 579,701.70 and 218,506.20

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Solution

The fourth proportional to 386,467.80, 579,701.70 and 218,506.20 is: 327,759.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,467.80 : 579,701.70 = 218,506.20 : x
  2. Step 2: Convert to fraction form
    386,467.80/579,701.70 = 218,506.20/x
  3. Step 3: Cross multiply
    386,467.80x = 579,701.70 × 218,506.20
  4. Step 4: Simplify right side
    386,467.80x = 126,668,415,600.54
  5. Step 5: Solve for x
    x = 126,668,415,600.54/386,467.80
  6. Step 6: Final answer
    x = 327,759.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.