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Finding the Fourth Proportional to 907,912.80, 1,361,869.20 and 809,935.20

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Solution

The fourth proportional to 907,912.80, 1,361,869.20 and 809,935.20 is: 1,214,902.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,912.80 : 1,361,869.20 = 809,935.20 : x
  2. Step 2: Convert to fraction form
    907,912.80/1,361,869.20 = 809,935.20/x
  3. Step 3: Cross multiply
    907,912.80x = 1,361,869.20 × 809,935.20
  4. Step 4: Simplify right side
    907,912.80x = 1,103,025,802,875.84
  5. Step 5: Solve for x
    x = 1,103,025,802,875.84/907,912.80
  6. Step 6: Final answer
    x = 1,214,902.80

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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.