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Finding the Fourth Proportional to 400,831.20, 601,246.80 and 134,600.40

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Solution

The fourth proportional to 400,831.20, 601,246.80 and 134,600.40 is: 201,900.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,831.20 : 601,246.80 = 134,600.40 : x
  2. Step 2: Convert to fraction form
    400,831.20/601,246.80 = 134,600.40/x
  3. Step 3: Cross multiply
    400,831.20x = 601,246.80 × 134,600.40
  4. Step 4: Simplify right side
    400,831.20x = 80,928,059,778.72
  5. Step 5: Solve for x
    x = 80,928,059,778.72/400,831.20
  6. Step 6: Final answer
    x = 201,900.60

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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.