Home / 1,918,747.09-2,878,081.12-639,447.45

Finding the Fourth Proportional to 1,918,747.09, 2,878,081.12 and 639,447.45

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Solution

The fourth proportional to 1,918,747.09, 2,878,081.12 and 639,447.45 is: 959,158.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,747.09 : 2,878,081.12 = 639,447.45 : x
  2. Step 2: Convert to fraction form
    1,918,747.09/2,878,081.12 = 639,447.45/x
  3. Step 3: Cross multiply
    1,918,747.09x = 2,878,081.12 × 639,447.45
  4. Step 4: Simplify right side
    1,918,747.09x = 1,840,381,633,077.14
  5. Step 5: Solve for x
    x = 1,840,381,633,077.14/1,918,747.09
  6. Step 6: Final answer
    x = 959,158.01

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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.