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Finding the Fourth Proportional to 1,376.44, 1,898.82 and 911.08

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Solution

The fourth proportional to 1,376.44, 1,898.82 and 911.08 is: 1,256.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.44 : 1,898.82 = 911.08 : x
  2. Step 2: Convert to fraction form
    1,376.44/1,898.82 = 911.08/x
  3. Step 3: Cross multiply
    1,376.44x = 1,898.82 × 911.08
  4. Step 4: Simplify right side
    1,376.44x = 1,729,976.93
  5. Step 5: Solve for x
    x = 1,729,976.93/1,376.44
  6. Step 6: Final answer
    x = 1,256.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.