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Finding the Fourth Proportional to 308,570.37, 462,689.12 and 139,998.71

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Solution

The fourth proportional to 308,570.37, 462,689.12 and 139,998.71 is: 209,922.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,570.37 : 462,689.12 = 139,998.71 : x
  2. Step 2: Convert to fraction form
    308,570.37/462,689.12 = 139,998.71/x
  3. Step 3: Cross multiply
    308,570.37x = 462,689.12 × 139,998.71
  4. Step 4: Simplify right side
    308,570.37x = 64,775,876,917.60
  5. Step 5: Solve for x
    x = 64,775,876,917.60/308,570.37
  6. Step 6: Final answer
    x = 209,922.54

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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.