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Finding the Fourth Proportional to 1,396.92, 1,913.79 and 1,344.38

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Solution

The fourth proportional to 1,396.92, 1,913.79 and 1,344.38 is: 1,841.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.92 : 1,913.79 = 1,344.38 : x
  2. Step 2: Convert to fraction form
    1,396.92/1,913.79 = 1,344.38/x
  3. Step 3: Cross multiply
    1,396.92x = 1,913.79 × 1,344.38
  4. Step 4: Simplify right side
    1,396.92x = 2,572,858.61
  5. Step 5: Solve for x
    x = 2,572,858.61/1,396.92
  6. Step 6: Final answer
    x = 1,841.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.