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Finding the Fourth Proportional to 378,388.60, 566,805.30 and 191,505.40

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Solution

The fourth proportional to 378,388.60, 566,805.30 and 191,505.40 is: 286,864.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,388.60 : 566,805.30 = 191,505.40 : x
  2. Step 2: Convert to fraction form
    378,388.60/566,805.30 = 191,505.40/x
  3. Step 3: Cross multiply
    378,388.60x = 566,805.30 × 191,505.40
  4. Step 4: Simplify right side
    378,388.60x = 108,546,275,698.62
  5. Step 5: Solve for x
    x = 108,546,275,698.62/378,388.60
  6. Step 6: Final answer
    x = 286,864.55

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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.