Home / 1,289,628.80-1,935,998.40-721,462.40

Finding the Fourth Proportional to 1,289,628.80, 1,935,998.40 and 721,462.40

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Solution

The fourth proportional to 1,289,628.80, 1,935,998.40 and 721,462.40 is: 1,083,063.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,628.80 : 1,935,998.40 = 721,462.40 : x
  2. Step 2: Convert to fraction form
    1,289,628.80/1,935,998.40 = 721,462.40/x
  3. Step 3: Cross multiply
    1,289,628.80x = 1,935,998.40 × 721,462.40
  4. Step 4: Simplify right side
    1,289,628.80x = 1,396,750,052,060.16
  5. Step 5: Solve for x
    x = 1,396,750,052,060.16/1,289,628.80
  6. Step 6: Final answer
    x = 1,083,063.63

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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.