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Finding the Fourth Proportional to 352,004.46, 485,638.80 and 231,211.20

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Solution

The fourth proportional to 352,004.46, 485,638.80 and 231,211.20 is: 318,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,004.46 : 485,638.80 = 231,211.20 : x
  2. Step 2: Convert to fraction form
    352,004.46/485,638.80 = 231,211.20/x
  3. Step 3: Cross multiply
    352,004.46x = 485,638.80 × 231,211.20
  4. Step 4: Simplify right side
    352,004.46x = 112,285,129,714.56
  5. Step 5: Solve for x
    x = 112,285,129,714.56/352,004.46
  6. Step 6: Final answer
    x = 318,987.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.