Home / 872,890,471.09-1,309,508,191.23-320,198,031.28

Finding the Fourth Proportional to 872,890,471.09, 1,309,508,191.23 and 320,198,031.28

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Solution

The fourth proportional to 872,890,471.09, 1,309,508,191.23 and 320,198,031.28 is: 480,360,318.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,890,471.09 : 1,309,508,191.23 = 320,198,031.28 : x
  2. Step 2: Convert to fraction form
    872,890,471.09/1,309,508,191.23 = 320,198,031.28/x
  3. Step 3: Cross multiply
    872,890,471.09x = 1,309,508,191.23 × 320,198,031.28
  4. Step 4: Simplify right side
    872,890,471.09x = 419,301,944,776,879,744
  5. Step 5: Solve for x
    x = 419,301,944,776,879,744/872,890,471.09
  6. Step 6: Final answer
    x = 480,360,318.58

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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.