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Finding the Fourth Proportional to 1,212,491.80, 1,822,674.30 and 859,947.40

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Solution

The fourth proportional to 1,212,491.80, 1,822,674.30 and 859,947.40 is: 1,292,713.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,491.80 : 1,822,674.30 = 859,947.40 : x
  2. Step 2: Convert to fraction form
    1,212,491.80/1,822,674.30 = 859,947.40/x
  3. Step 3: Cross multiply
    1,212,491.80x = 1,822,674.30 × 859,947.40
  4. Step 4: Simplify right side
    1,212,491.80x = 1,567,404,025,331.82
  5. Step 5: Solve for x
    x = 1,567,404,025,331.82/1,212,491.80
  6. Step 6: Final answer
    x = 1,292,713.09

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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.