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Finding the Fourth Proportional to 665,815.68, 998,516.16 and 222,480

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Solution

The fourth proportional to 665,815.68, 998,516.16 and 222,480 is: 333,650.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,815.68 : 998,516.16 = 222,480 : x
  2. Step 2: Convert to fraction form
    665,815.68/998,516.16 = 222,480/x
  3. Step 3: Cross multiply
    665,815.68x = 998,516.16 × 222,480
  4. Step 4: Simplify right side
    665,815.68x = 222,149,875,276.80
  5. Step 5: Solve for x
    x = 222,149,875,276.80/665,815.68
  6. Step 6: Final answer
    x = 333,650.71

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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.