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Finding the Fourth Proportional to 254,999.70, 382,390.20 and 128,591.10

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Solution

The fourth proportional to 254,999.70, 382,390.20 and 128,591.10 is: 192,831.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,999.70 : 382,390.20 = 128,591.10 : x
  2. Step 2: Convert to fraction form
    254,999.70/382,390.20 = 128,591.10/x
  3. Step 3: Cross multiply
    254,999.70x = 382,390.20 × 128,591.10
  4. Step 4: Simplify right side
    254,999.70x = 49,171,976,447.22
  5. Step 5: Solve for x
    x = 49,171,976,447.22/254,999.70
  6. Step 6: Final answer
    x = 192,831.51

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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.