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Finding the Fourth Proportional to 819,108.40, 1,228,662.60 and 808,610.80

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Solution

The fourth proportional to 819,108.40, 1,228,662.60 and 808,610.80 is: 1,212,916.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,108.40 : 1,228,662.60 = 808,610.80 : x
  2. Step 2: Convert to fraction form
    819,108.40/1,228,662.60 = 808,610.80/x
  3. Step 3: Cross multiply
    819,108.40x = 1,228,662.60 × 808,610.80
  4. Step 4: Simplify right side
    819,108.40x = 993,509,847,916.08
  5. Step 5: Solve for x
    x = 993,509,847,916.08/819,108.40
  6. Step 6: Final answer
    x = 1,212,916.20

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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.