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Finding the Fourth Proportional to 1,370,847.72, 1,891,978.78 and 854,685.34

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Solution

The fourth proportional to 1,370,847.72, 1,891,978.78 and 854,685.34 is: 1,179,596.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370,847.72 : 1,891,978.78 = 854,685.34 : x
  2. Step 2: Convert to fraction form
    1,370,847.72/1,891,978.78 = 854,685.34/x
  3. Step 3: Cross multiply
    1,370,847.72x = 1,891,978.78 × 854,685.34
  4. Step 4: Simplify right side
    1,370,847.72x = 1,617,046,526,857.09
  5. Step 5: Solve for x
    x = 1,617,046,526,857.09/1,370,847.72
  6. Step 6: Final answer
    x = 1,179,596.03

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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.