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Finding the Fourth Proportional to 323,999.40, 485,999.10 and 312,189.60

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Solution

The fourth proportional to 323,999.40, 485,999.10 and 312,189.60 is: 468,284.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,999.40 : 485,999.10 = 312,189.60 : x
  2. Step 2: Convert to fraction form
    323,999.40/485,999.10 = 312,189.60/x
  3. Step 3: Cross multiply
    323,999.40x = 485,999.10 × 312,189.60
  4. Step 4: Simplify right side
    323,999.40x = 151,723,864,629.36
  5. Step 5: Solve for x
    x = 151,723,864,629.36/323,999.40
  6. Step 6: Final answer
    x = 468,284.40

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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.