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Finding the Fourth Proportional to 395,425.20, 593,137.80 and 368,986.80

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Solution

The fourth proportional to 395,425.20, 593,137.80 and 368,986.80 is: 553,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,425.20 : 593,137.80 = 368,986.80 : x
  2. Step 2: Convert to fraction form
    395,425.20/593,137.80 = 368,986.80/x
  3. Step 3: Cross multiply
    395,425.20x = 593,137.80 × 368,986.80
  4. Step 4: Simplify right side
    395,425.20x = 218,860,018,781.04
  5. Step 5: Solve for x
    x = 218,860,018,781.04/395,425.20
  6. Step 6: Final answer
    x = 553,480.20

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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.