Home / 1,289,633.80-1,936,005.90-721,467.40

Finding the Fourth Proportional to 1,289,633.80, 1,936,005.90 and 721,467.40

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Solution

The fourth proportional to 1,289,633.80, 1,936,005.90 and 721,467.40 is: 1,083,071.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,633.80 : 1,936,005.90 = 721,467.40 : x
  2. Step 2: Convert to fraction form
    1,289,633.80/1,936,005.90 = 721,467.40/x
  3. Step 3: Cross multiply
    1,289,633.80x = 1,936,005.90 × 721,467.40
  4. Step 4: Simplify right side
    1,289,633.80x = 1,396,765,143,057.66
  5. Step 5: Solve for x
    x = 1,396,765,143,057.66/1,289,633.80
  6. Step 6: Final answer
    x = 1,083,071.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.