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Finding the Fourth Proportional to 386,149.60, 579,224.40 and 320,831.20

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Solution

The fourth proportional to 386,149.60, 579,224.40 and 320,831.20 is: 481,246.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,149.60 : 579,224.40 = 320,831.20 : x
  2. Step 2: Convert to fraction form
    386,149.60/579,224.40 = 320,831.20/x
  3. Step 3: Cross multiply
    386,149.60x = 579,224.40 × 320,831.20
  4. Step 4: Simplify right side
    386,149.60x = 185,833,259,321.28
  5. Step 5: Solve for x
    x = 185,833,259,321.28/386,149.60
  6. Step 6: Final answer
    x = 481,246.80

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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.