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Finding the Fourth Proportional to 808,312.80, 1,212,469.20 and 683,896.80

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Solution

The fourth proportional to 808,312.80, 1,212,469.20 and 683,896.80 is: 1,025,845.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,312.80 : 1,212,469.20 = 683,896.80 : x
  2. Step 2: Convert to fraction form
    808,312.80/1,212,469.20 = 683,896.80/x
  3. Step 3: Cross multiply
    808,312.80x = 1,212,469.20 × 683,896.80
  4. Step 4: Simplify right side
    808,312.80x = 829,203,805,978.56
  5. Step 5: Solve for x
    x = 829,203,805,978.56/808,312.80
  6. Step 6: Final answer
    x = 1,025,845.20

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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.