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Finding the Fourth Proportional to 368,415.20, 552,622.80 and 131,765.60

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Solution

The fourth proportional to 368,415.20, 552,622.80 and 131,765.60 is: 197,648.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,415.20 : 552,622.80 = 131,765.60 : x
  2. Step 2: Convert to fraction form
    368,415.20/552,622.80 = 131,765.60/x
  3. Step 3: Cross multiply
    368,415.20x = 552,622.80 × 131,765.60
  4. Step 4: Simplify right side
    368,415.20x = 72,816,674,815.68
  5. Step 5: Solve for x
    x = 72,816,674,815.68/368,415.20
  6. Step 6: Final answer
    x = 197,648.40

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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.