Home / 2,158,142.20-2,978,235.78-1,191,272.22

Finding the Fourth Proportional to 2,158,142.20, 2,978,235.78 and 1,191,272.22

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Solution

The fourth proportional to 2,158,142.20, 2,978,235.78 and 1,191,272.22 is: 1,643,955.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158,142.20 : 2,978,235.78 = 1,191,272.22 : x
  2. Step 2: Convert to fraction form
    2,158,142.20/2,978,235.78 = 1,191,272.22/x
  3. Step 3: Cross multiply
    2,158,142.20x = 2,978,235.78 × 1,191,272.22
  4. Step 4: Simplify right side
    2,158,142.20x = 3,547,889,549,324.03
  5. Step 5: Solve for x
    x = 3,547,889,549,324.03/2,158,142.20
  6. Step 6: Final answer
    x = 1,643,955.41

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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.