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Finding the Fourth Proportional to 367,620.90, 551,431.35 and 209,865.30

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Solution

The fourth proportional to 367,620.90, 551,431.35 and 209,865.30 is: 314,797.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,620.90 : 551,431.35 = 209,865.30 : x
  2. Step 2: Convert to fraction form
    367,620.90/551,431.35 = 209,865.30/x
  3. Step 3: Cross multiply
    367,620.90x = 551,431.35 × 209,865.30
  4. Step 4: Simplify right side
    367,620.90x = 115,726,305,697.16
  5. Step 5: Solve for x
    x = 115,726,305,697.16/367,620.90
  6. Step 6: Final answer
    x = 314,797.95

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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.