Home / 1,942.09-2,911.08-1,393.98

Finding the Fourth Proportional to 1,942.09, 2,911.08 and 1,393.98

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Solution

The fourth proportional to 1,942.09, 2,911.08 and 1,393.98 is: 2,089.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.09 : 2,911.08 = 1,393.98 : x
  2. Step 2: Convert to fraction form
    1,942.09/2,911.08 = 1,393.98/x
  3. Step 3: Cross multiply
    1,942.09x = 2,911.08 × 1,393.98
  4. Step 4: Simplify right side
    1,942.09x = 4,057,981.61
  5. Step 5: Solve for x
    x = 4,057,981.61/1,942.09
  6. Step 6: Final answer
    x = 2,089.49

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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.