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Finding the Fourth Proportional to 324,986.60, 487,767.90 and 191,700.20

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Solution

The fourth proportional to 324,986.60, 487,767.90 and 191,700.20 is: 287,720.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,986.60 : 487,767.90 = 191,700.20 : x
  2. Step 2: Convert to fraction form
    324,986.60/487,767.90 = 191,700.20/x
  3. Step 3: Cross multiply
    324,986.60x = 487,767.90 × 191,700.20
  4. Step 4: Simplify right side
    324,986.60x = 93,505,203,983.58
  5. Step 5: Solve for x
    x = 93,505,203,983.58/324,986.60
  6. Step 6: Final answer
    x = 287,720.18

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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.