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Finding the Fourth Proportional to 490,813.60, 736,227.20 and 323,405.60

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Solution

The fourth proportional to 490,813.60, 736,227.20 and 323,405.60 is: 485,112.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,813.60 : 736,227.20 = 323,405.60 : x
  2. Step 2: Convert to fraction form
    490,813.60/736,227.20 = 323,405.60/x
  3. Step 3: Cross multiply
    490,813.60x = 736,227.20 × 323,405.60
  4. Step 4: Simplify right side
    490,813.60x = 238,099,999,352.32
  5. Step 5: Solve for x
    x = 238,099,999,352.32/490,813.60
  6. Step 6: Final answer
    x = 485,112.88

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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.