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Finding the Fourth Proportional to 809,719.40, 1,214,579.10 and 748,893.80

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Solution

The fourth proportional to 809,719.40, 1,214,579.10 and 748,893.80 is: 1,123,340.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,719.40 : 1,214,579.10 = 748,893.80 : x
  2. Step 2: Convert to fraction form
    809,719.40/1,214,579.10 = 748,893.80/x
  3. Step 3: Cross multiply
    809,719.40x = 1,214,579.10 × 748,893.80
  4. Step 4: Simplify right side
    809,719.40x = 909,590,757,599.58
  5. Step 5: Solve for x
    x = 909,590,757,599.58/809,719.40
  6. Step 6: Final answer
    x = 1,123,340.70

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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.