Home / 1,918.61-2,868.90-1,369.09

Finding the Fourth Proportional to 1,918.61, 2,868.90 and 1,369.09

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Solution

The fourth proportional to 1,918.61, 2,868.90 and 1,369.09 is: 2,047.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.61 : 2,868.90 = 1,369.09 : x
  2. Step 2: Convert to fraction form
    1,918.61/2,868.90 = 1,369.09/x
  3. Step 3: Cross multiply
    1,918.61x = 2,868.90 × 1,369.09
  4. Step 4: Simplify right side
    1,918.61x = 3,927,782.30
  5. Step 5: Solve for x
    x = 3,927,782.30/1,918.61
  6. Step 6: Final answer
    x = 2,047.20

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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.