Home / 1,389,091.06-1,916,378.35-905,479.75

Finding the Fourth Proportional to 1,389,091.06, 1,916,378.35 and 905,479.75

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Solution

The fourth proportional to 1,389,091.06, 1,916,378.35 and 905,479.75 is: 1,249,192.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,091.06 : 1,916,378.35 = 905,479.75 : x
  2. Step 2: Convert to fraction form
    1,389,091.06/1,916,378.35 = 905,479.75/x
  3. Step 3: Cross multiply
    1,389,091.06x = 1,916,378.35 × 905,479.75
  4. Step 4: Simplify right side
    1,389,091.06x = 1,735,241,789,263.41
  5. Step 5: Solve for x
    x = 1,735,241,789,263.41/1,389,091.06
  6. Step 6: Final answer
    x = 1,249,192.25

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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.