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Finding the Fourth Proportional to 1,274.24, 1,908.48 and 909.44

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Solution

The fourth proportional to 1,274.24, 1,908.48 and 909.44 is: 1,362.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.24 : 1,908.48 = 909.44 : x
  2. Step 2: Convert to fraction form
    1,274.24/1,908.48 = 909.44/x
  3. Step 3: Cross multiply
    1,274.24x = 1,908.48 × 909.44
  4. Step 4: Simplify right side
    1,274.24x = 1,735,648.05
  5. Step 5: Solve for x
    x = 1,735,648.05/1,274.24
  6. Step 6: Final answer
    x = 1,362.10

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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.