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Finding the Fourth Proportional to 585,645.20, 878,467.80 and 386,190.80

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Solution

The fourth proportional to 585,645.20, 878,467.80 and 386,190.80 is: 579,286.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,645.20 : 878,467.80 = 386,190.80 : x
  2. Step 2: Convert to fraction form
    585,645.20/878,467.80 = 386,190.80/x
  3. Step 3: Cross multiply
    585,645.20x = 878,467.80 × 386,190.80
  4. Step 4: Simplify right side
    585,645.20x = 339,256,182,456.24
  5. Step 5: Solve for x
    x = 339,256,182,456.24/585,645.20
  6. Step 6: Final answer
    x = 579,286.20

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Similar ratio
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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.