Home / 2,865.87-4,298.94-918.36

Finding the Fourth Proportional to 2,865.87, 4,298.94 and 918.36

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Solution

The fourth proportional to 2,865.87, 4,298.94 and 918.36 is: 1,377.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.87 : 4,298.94 = 918.36 : x
  2. Step 2: Convert to fraction form
    2,865.87/4,298.94 = 918.36/x
  3. Step 3: Cross multiply
    2,865.87x = 4,298.94 × 918.36
  4. Step 4: Simplify right side
    2,865.87x = 3,947,974.54
  5. Step 5: Solve for x
    x = 3,947,974.54/2,865.87
  6. Step 6: Final answer
    x = 1,377.58

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1.5x scale

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.