Home / 1,918,878.29-2,878,120.19-639,347.57

Finding the Fourth Proportional to 1,918,878.29, 2,878,120.19 and 639,347.57

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Solution

The fourth proportional to 1,918,878.29, 2,878,120.19 and 639,347.57 is: 958,955.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,878.29 : 2,878,120.19 = 639,347.57 : x
  2. Step 2: Convert to fraction form
    1,918,878.29/2,878,120.19 = 639,347.57/x
  3. Step 3: Cross multiply
    1,918,878.29x = 2,878,120.19 × 639,347.57
  4. Step 4: Simplify right side
    1,918,878.29x = 1,840,119,149,644.44
  5. Step 5: Solve for x
    x = 1,840,119,149,644.44/1,918,878.29
  6. Step 6: Final answer
    x = 958,955.64

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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.