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Finding the Fourth Proportional to 808,912.40, 1,212,785.40 and 454,035.20

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Solution

The fourth proportional to 808,912.40, 1,212,785.40 and 454,035.20 is: 680,725.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,912.40 : 1,212,785.40 = 454,035.20 : x
  2. Step 2: Convert to fraction form
    808,912.40/1,212,785.40 = 454,035.20/x
  3. Step 3: Cross multiply
    808,912.40x = 1,212,785.40 × 454,035.20
  4. Step 4: Simplify right side
    808,912.40x = 550,647,261,646.08
  5. Step 5: Solve for x
    x = 550,647,261,646.08/808,912.40
  6. Step 6: Final answer
    x = 680,725.46

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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.