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Finding the Fourth Proportional to 260,831.60, 391,260.20 and 136,415.60

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Solution

The fourth proportional to 260,831.60, 391,260.20 and 136,415.60 is: 204,630.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,831.60 : 391,260.20 = 136,415.60 : x
  2. Step 2: Convert to fraction form
    260,831.60/391,260.20 = 136,415.60/x
  3. Step 3: Cross multiply
    260,831.60x = 391,260.20 × 136,415.60
  4. Step 4: Simplify right side
    260,831.60x = 53,373,994,939.12
  5. Step 5: Solve for x
    x = 53,373,994,939.12/260,831.60
  6. Step 6: Final answer
    x = 204,630.09

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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.