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Finding the Fourth Proportional to 347,367.20, 520,921.20 and 136,961.60

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Solution

The fourth proportional to 347,367.20, 520,921.20 and 136,961.60 is: 205,391.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,367.20 : 520,921.20 = 136,961.60 : x
  2. Step 2: Convert to fraction form
    347,367.20/520,921.20 = 136,961.60/x
  3. Step 3: Cross multiply
    347,367.20x = 520,921.20 × 136,961.60
  4. Step 4: Simplify right side
    347,367.20x = 71,346,201,025.92
  5. Step 5: Solve for x
    x = 71,346,201,025.92/347,367.20
  6. Step 6: Final answer
    x = 205,391.30

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1.5x scale

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.