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Finding the Fourth Proportional to 323,618.70, 485,428.05 and 205,812.30

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Solution

The fourth proportional to 323,618.70, 485,428.05 and 205,812.30 is: 308,718.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,618.70 : 485,428.05 = 205,812.30 : x
  2. Step 2: Convert to fraction form
    323,618.70/485,428.05 = 205,812.30/x
  3. Step 3: Cross multiply
    323,618.70x = 485,428.05 × 205,812.30
  4. Step 4: Simplify right side
    323,618.70x = 99,907,063,455.02
  5. Step 5: Solve for x
    x = 99,907,063,455.02/323,618.70
  6. Step 6: Final answer
    x = 308,718.45

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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.