Home / 1,918,835.28-2,878,212.72-639,535.36

Finding the Fourth Proportional to 1,918,835.28, 2,878,212.72 and 639,535.36

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Solution

The fourth proportional to 1,918,835.28, 2,878,212.72 and 639,535.36 is: 959,289.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,835.28 : 2,878,212.72 = 639,535.36 : x
  2. Step 2: Convert to fraction form
    1,918,835.28/2,878,212.72 = 639,535.36/x
  3. Step 3: Cross multiply
    1,918,835.28x = 2,878,212.72 × 639,535.36
  4. Step 4: Simplify right side
    1,918,835.28x = 1,840,718,808,041.78
  5. Step 5: Solve for x
    x = 1,840,718,808,041.78/1,918,835.28
  6. Step 6: Final answer
    x = 959,289.64

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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.