Home / 1,787.87-2,466.45-1,289.72

Finding the Fourth Proportional to 1,787.87, 2,466.45 and 1,289.72

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Solution

The fourth proportional to 1,787.87, 2,466.45 and 1,289.72 is: 1,779.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.87 : 2,466.45 = 1,289.72 : x
  2. Step 2: Convert to fraction form
    1,787.87/2,466.45 = 1,289.72/x
  3. Step 3: Cross multiply
    1,787.87x = 2,466.45 × 1,289.72
  4. Step 4: Simplify right side
    1,787.87x = 3,181,036.06
  5. Step 5: Solve for x
    x = 3,181,036.06/1,787.87
  6. Step 6: Final answer
    x = 1,779.23

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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.