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Finding the Fourth Proportional to 2,865.40, 4,297.22 and 917.08

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Solution

The fourth proportional to 2,865.40, 4,297.22 and 917.08 is: 1,375.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.40 : 4,297.22 = 917.08 : x
  2. Step 2: Convert to fraction form
    2,865.40/4,297.22 = 917.08/x
  3. Step 3: Cross multiply
    2,865.40x = 4,297.22 × 917.08
  4. Step 4: Simplify right side
    2,865.40x = 3,940,894.52
  5. Step 5: Solve for x
    x = 3,940,894.52/2,865.40
  6. Step 6: Final answer
    x = 1,375.34

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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.