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Finding the Fourth Proportional to 2,650.26, 3,975.45 and 918.88

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Solution

The fourth proportional to 2,650.26, 3,975.45 and 918.88 is: 1,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,650.26 : 3,975.45 = 918.88 : x
  2. Step 2: Convert to fraction form
    2,650.26/3,975.45 = 918.88/x
  3. Step 3: Cross multiply
    2,650.26x = 3,975.45 × 918.88
  4. Step 4: Simplify right side
    2,650.26x = 3,652,961.50
  5. Step 5: Solve for x
    x = 3,652,961.50/2,650.26
  6. Step 6: Final answer
    x = 1,378.34

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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.