Home / 2,187,779.76-3,019,287.78-1,221,098.40

Finding the Fourth Proportional to 2,187,779.76, 3,019,287.78 and 1,221,098.40

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Solution

The fourth proportional to 2,187,779.76, 3,019,287.78 and 1,221,098.40 is: 1,685,200.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187,779.76 : 3,019,287.78 = 1,221,098.40 : x
  2. Step 2: Convert to fraction form
    2,187,779.76/3,019,287.78 = 1,221,098.40/x
  3. Step 3: Cross multiply
    2,187,779.76x = 3,019,287.78 × 1,221,098.40
  4. Step 4: Simplify right side
    2,187,779.76x = 3,686,847,477,297.55
  5. Step 5: Solve for x
    x = 3,686,847,477,297.55/2,187,779.76
  6. Step 6: Final answer
    x = 1,685,200.47

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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.