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Finding the Fourth Proportional to 1,942.41, 2,913.91 and 692.91

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Solution

The fourth proportional to 1,942.41, 2,913.91 and 692.91 is: 1,039.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.41 : 2,913.91 = 692.91 : x
  2. Step 2: Convert to fraction form
    1,942.41/2,913.91 = 692.91/x
  3. Step 3: Cross multiply
    1,942.41x = 2,913.91 × 692.91
  4. Step 4: Simplify right side
    1,942.41x = 2,019,076.23
  5. Step 5: Solve for x
    x = 2,019,076.23/1,942.41
  6. Step 6: Final answer
    x = 1,039.47

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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.