Home / 1,840.89-2,758.70-1,428.09

Finding the Fourth Proportional to 1,840.89, 2,758.70 and 1,428.09

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Solution

The fourth proportional to 1,840.89, 2,758.70 and 1,428.09 is: 2,140.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.89 : 2,758.70 = 1,428.09 : x
  2. Step 2: Convert to fraction form
    1,840.89/2,758.70 = 1,428.09/x
  3. Step 3: Cross multiply
    1,840.89x = 2,758.70 × 1,428.09
  4. Step 4: Simplify right side
    1,840.89x = 3,939,664.74
  5. Step 5: Solve for x
    x = 3,939,664.74/1,840.89
  6. Step 6: Final answer
    x = 2,140.09

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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.