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Finding the Fourth Proportional to 1,787.58, 2,678.41 and 1,264.99

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Solution

The fourth proportional to 1,787.58, 2,678.41 and 1,264.99 is: 1,895.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.58 : 2,678.41 = 1,264.99 : x
  2. Step 2: Convert to fraction form
    1,787.58/2,678.41 = 1,264.99/x
  3. Step 3: Cross multiply
    1,787.58x = 2,678.41 × 1,264.99
  4. Step 4: Simplify right side
    1,787.58x = 3,388,155.54
  5. Step 5: Solve for x
    x = 3,388,155.54/1,787.58
  6. Step 6: Final answer
    x = 1,895.39

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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.