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Finding the Fourth Proportional to 2,978,217.08, 4,109,936.46 and 1,620,086.84

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Solution

The fourth proportional to 2,978,217.08, 4,109,936.46 and 1,620,086.84 is: 2,235,718.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978,217.08 : 4,109,936.46 = 1,620,086.84 : x
  2. Step 2: Convert to fraction form
    2,978,217.08/4,109,936.46 = 1,620,086.84/x
  3. Step 3: Cross multiply
    2,978,217.08x = 4,109,936.46 × 1,620,086.84
  4. Step 4: Simplify right side
    2,978,217.08x = 6,658,453,972,082.19
  5. Step 5: Solve for x
    x = 6,658,453,972,082.19/2,978,217.08
  6. Step 6: Final answer
    x = 2,235,718.15

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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.