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Finding the Fourth Proportional to 418,831.20, 628,008.16 and 285,872.48

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Solution

The fourth proportional to 418,831.20, 628,008.16 and 285,872.48 is: 428,645.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,831.20 : 628,008.16 = 285,872.48 : x
  2. Step 2: Convert to fraction form
    418,831.20/628,008.16 = 285,872.48/x
  3. Step 3: Cross multiply
    418,831.20x = 628,008.16 × 285,872.48
  4. Step 4: Simplify right side
    418,831.20x = 179,530,250,159.44
  5. Step 5: Solve for x
    x = 179,530,250,159.44/418,831.20
  6. Step 6: Final answer
    x = 428,645.84

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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.