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Finding the Fourth Proportional to 324,859.20, 487,215.90 and 213,322.20

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Solution

The fourth proportional to 324,859.20, 487,215.90 and 213,322.20 is: 319,935.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,859.20 : 487,215.90 = 213,322.20 : x
  2. Step 2: Convert to fraction form
    324,859.20/487,215.90 = 213,322.20/x
  3. Step 3: Cross multiply
    324,859.20x = 487,215.90 × 213,322.20
  4. Step 4: Simplify right side
    324,859.20x = 103,933,967,662.98
  5. Step 5: Solve for x
    x = 103,933,967,662.98/324,859.20
  6. Step 6: Final answer
    x = 319,935.43

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1.5x scale

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.