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Finding the Fourth Proportional to 400,831.20, 601,246.80 and 374,392.80

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Solution

The fourth proportional to 400,831.20, 601,246.80 and 374,392.80 is: 561,589.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,831.20 : 601,246.80 = 374,392.80 : x
  2. Step 2: Convert to fraction form
    400,831.20/601,246.80 = 374,392.80/x
  3. Step 3: Cross multiply
    400,831.20x = 601,246.80 × 374,392.80
  4. Step 4: Simplify right side
    400,831.20x = 225,102,472,943.04
  5. Step 5: Solve for x
    x = 225,102,472,943.04/400,831.20
  6. Step 6: Final answer
    x = 561,589.20

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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.