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Finding the Fourth Proportional to 395,812.80, 593,661.60 and 115,300.80

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Solution

The fourth proportional to 395,812.80, 593,661.60 and 115,300.80 is: 172,934.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,812.80 : 593,661.60 = 115,300.80 : x
  2. Step 2: Convert to fraction form
    395,812.80/593,661.60 = 115,300.80/x
  3. Step 3: Cross multiply
    395,812.80x = 593,661.60 × 115,300.80
  4. Step 4: Simplify right side
    395,812.80x = 68,449,657,409.28
  5. Step 5: Solve for x
    x = 68,449,657,409.28/395,812.80
  6. Step 6: Final answer
    x = 172,934.42

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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.