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Finding the Fourth Proportional to 1,795,787.51, 2,478,180.87 and 979,991.15

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Solution

The fourth proportional to 1,795,787.51, 2,478,180.87 and 979,991.15 is: 1,352,384.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,795,787.51 : 2,478,180.87 = 979,991.15 : x
  2. Step 2: Convert to fraction form
    1,795,787.51/2,478,180.87 = 979,991.15/x
  3. Step 3: Cross multiply
    1,795,787.51x = 2,478,180.87 × 979,991.15
  4. Step 4: Simplify right side
    1,795,787.51x = 2,428,595,308,308.40
  5. Step 5: Solve for x
    x = 2,428,595,308,308.40/1,795,787.51
  6. Step 6: Final answer
    x = 1,352,384.57

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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.