Home / 1,390,738.90-1,919,516.24-818,105.76

Finding the Fourth Proportional to 1,390,738.90, 1,919,516.24 and 818,105.76

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Solution

The fourth proportional to 1,390,738.90, 1,919,516.24 and 818,105.76 is: 1,129,160.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,738.90 : 1,919,516.24 = 818,105.76 : x
  2. Step 2: Convert to fraction form
    1,390,738.90/1,919,516.24 = 818,105.76/x
  3. Step 3: Cross multiply
    1,390,738.90x = 1,919,516.24 × 818,105.76
  4. Step 4: Simplify right side
    1,390,738.90x = 1,570,367,292,357.54
  5. Step 5: Solve for x
    x = 1,570,367,292,357.54/1,390,738.90
  6. Step 6: Final answer
    x = 1,129,160.40

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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.