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Finding the Fourth Proportional to 1,280,414.04, 1,764,918.90 and 866,820.48

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Solution

The fourth proportional to 1,280,414.04, 1,764,918.90 and 866,820.48 is: 1,194,822.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,414.04 : 1,764,918.90 = 866,820.48 : x
  2. Step 2: Convert to fraction form
    1,280,414.04/1,764,918.90 = 866,820.48/x
  3. Step 3: Cross multiply
    1,280,414.04x = 1,764,918.90 × 866,820.48
  4. Step 4: Simplify right side
    1,280,414.04x = 1,529,867,848,059.07
  5. Step 5: Solve for x
    x = 1,529,867,848,059.07/1,280,414.04
  6. Step 6: Final answer
    x = 1,194,822.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.