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Finding the Fourth Proportional to 323,815.20, 485,722.80 and 235,687.20

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Solution

The fourth proportional to 323,815.20, 485,722.80 and 235,687.20 is: 353,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,815.20 : 485,722.80 = 235,687.20 : x
  2. Step 2: Convert to fraction form
    323,815.20/485,722.80 = 235,687.20/x
  3. Step 3: Cross multiply
    323,815.20x = 485,722.80 × 235,687.20
  4. Step 4: Simplify right side
    323,815.20x = 114,478,646,708.16
  5. Step 5: Solve for x
    x = 114,478,646,708.16/323,815.20
  6. Step 6: Final answer
    x = 353,530.80

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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.