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Finding the Fourth Proportional to 1,375,787.31, 2,054,416.68 and 1,123,568.51

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Solution

The fourth proportional to 1,375,787.31, 2,054,416.68 and 1,123,568.51 is: 1,677,786.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,787.31 : 2,054,416.68 = 1,123,568.51 : x
  2. Step 2: Convert to fraction form
    1,375,787.31/2,054,416.68 = 1,123,568.51/x
  3. Step 3: Cross multiply
    1,375,787.31x = 2,054,416.68 × 1,123,568.51
  4. Step 4: Simplify right side
    1,375,787.31x = 2,308,277,877,794.66
  5. Step 5: Solve for x
    x = 2,308,277,877,794.66/1,375,787.31
  6. Step 6: Final answer
    x = 1,677,786.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.