Home / 1,860.29-2,787.75-1,120.20

Finding the Fourth Proportional to 1,860.29, 2,787.75 and 1,120.20

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Solution

The fourth proportional to 1,860.29, 2,787.75 and 1,120.20 is: 1,678.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.29 : 2,787.75 = 1,120.20 : x
  2. Step 2: Convert to fraction form
    1,860.29/2,787.75 = 1,120.20/x
  3. Step 3: Cross multiply
    1,860.29x = 2,787.75 × 1,120.20
  4. Step 4: Simplify right side
    1,860.29x = 3,122,837.55
  5. Step 5: Solve for x
    x = 3,122,837.55/1,860.29
  6. Step 6: Final answer
    x = 1,678.69

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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.