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Finding the Fourth Proportional to 2,158,674.52, 2,978,975.36 and 1,191,806.68

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Solution

The fourth proportional to 2,158,674.52, 2,978,975.36 and 1,191,806.68 is: 1,644,695.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158,674.52 : 2,978,975.36 = 1,191,806.68 : x
  2. Step 2: Convert to fraction form
    2,158,674.52/2,978,975.36 = 1,191,806.68/x
  3. Step 3: Cross multiply
    2,158,674.52x = 2,978,975.36 × 1,191,806.68
  4. Step 4: Simplify right side
    2,158,674.52x = 3,550,362,733,603.40
  5. Step 5: Solve for x
    x = 3,550,362,733,603.40/2,158,674.52
  6. Step 6: Final answer
    x = 1,644,695.72

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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.