Home / 1,277.75-1,916.80-455.85

Finding the Fourth Proportional to 1,277.75, 1,916.80 and 455.85

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Solution

The fourth proportional to 1,277.75, 1,916.80 and 455.85 is: 683.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.75 : 1,916.80 = 455.85 : x
  2. Step 2: Convert to fraction form
    1,277.75/1,916.80 = 455.85/x
  3. Step 3: Cross multiply
    1,277.75x = 1,916.80 × 455.85
  4. Step 4: Simplify right side
    1,277.75x = 873,763.70
  5. Step 5: Solve for x
    x = 873,763.70/1,277.75
  6. Step 6: Final answer
    x = 683.83

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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.