Home / 1,392,785.40-1,921,336.41-909,633.36

Finding the Fourth Proportional to 1,392,785.40, 1,921,336.41 and 909,633.36

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Solution

The fourth proportional to 1,392,785.40, 1,921,336.41 and 909,633.36 is: 1,254,832.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,785.40 : 1,921,336.41 = 909,633.36 : x
  2. Step 2: Convert to fraction form
    1,392,785.40/1,921,336.41 = 909,633.36/x
  3. Step 3: Cross multiply
    1,392,785.40x = 1,921,336.41 × 909,633.36
  4. Step 4: Simplify right side
    1,392,785.40x = 1,747,711,694,318.64
  5. Step 5: Solve for x
    x = 1,747,711,694,318.64/1,392,785.40
  6. Step 6: Final answer
    x = 1,254,832.00

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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.