Home / 1,905.64-2,858.22-518.89

Finding the Fourth Proportional to 1,905.64, 2,858.22 and 518.89

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Solution

The fourth proportional to 1,905.64, 2,858.22 and 518.89 is: 778.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.64 : 2,858.22 = 518.89 : x
  2. Step 2: Convert to fraction form
    1,905.64/2,858.22 = 518.89/x
  3. Step 3: Cross multiply
    1,905.64x = 2,858.22 × 518.89
  4. Step 4: Simplify right side
    1,905.64x = 1,483,101.78
  5. Step 5: Solve for x
    x = 1,483,101.78/1,905.64
  6. Step 6: Final answer
    x = 778.27

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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.