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Finding the Fourth Proportional to 323,505.60, 485,258.40 and 290,846.40

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Solution

The fourth proportional to 323,505.60, 485,258.40 and 290,846.40 is: 436,269.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,505.60 : 485,258.40 = 290,846.40 : x
  2. Step 2: Convert to fraction form
    323,505.60/485,258.40 = 290,846.40/x
  3. Step 3: Cross multiply
    323,505.60x = 485,258.40 × 290,846.40
  4. Step 4: Simplify right side
    323,505.60x = 141,135,658,709.76
  5. Step 5: Solve for x
    x = 141,135,658,709.76/323,505.60
  6. Step 6: Final answer
    x = 436,269.60

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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.