Home / 2,158,078.78-2,978,148.87-1,191,209.32

Finding the Fourth Proportional to 2,158,078.78, 2,978,148.87 and 1,191,209.32

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Solution

The fourth proportional to 2,158,078.78, 2,978,148.87 and 1,191,209.32 is: 1,643,868.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158,078.78 : 2,978,148.87 = 1,191,209.32 : x
  2. Step 2: Convert to fraction form
    2,158,078.78/2,978,148.87 = 1,191,209.32/x
  3. Step 3: Cross multiply
    2,158,078.78x = 2,978,148.87 × 1,191,209.32
  4. Step 4: Simplify right side
    2,158,078.78x = 3,547,598,690,291.47
  5. Step 5: Solve for x
    x = 3,547,598,690,291.47/2,158,078.78
  6. Step 6: Final answer
    x = 1,643,868.95

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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.