Home / 1,391,057.64-1,919,829.06-818,070.12

Finding the Fourth Proportional to 1,391,057.64, 1,919,829.06 and 818,070.12

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Solution

The fourth proportional to 1,391,057.64, 1,919,829.06 and 818,070.12 is: 1,129,036.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,057.64 : 1,919,829.06 = 818,070.12 : x
  2. Step 2: Convert to fraction form
    1,391,057.64/1,919,829.06 = 818,070.12/x
  3. Step 3: Cross multiply
    1,391,057.64x = 1,919,829.06 × 818,070.12
  4. Step 4: Simplify right side
    1,391,057.64x = 1,570,554,789,493.69
  5. Step 5: Solve for x
    x = 1,570,554,789,493.69/1,391,057.64
  6. Step 6: Final answer
    x = 1,129,036.46

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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.