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Finding the Fourth Proportional to 1,873.90, 2,808.42 and 1,256.68

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Solution

The fourth proportional to 1,873.90, 2,808.42 and 1,256.68 is: 1,883.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,873.90 : 2,808.42 = 1,256.68 : x
  2. Step 2: Convert to fraction form
    1,873.90/2,808.42 = 1,256.68/x
  3. Step 3: Cross multiply
    1,873.90x = 2,808.42 × 1,256.68
  4. Step 4: Simplify right side
    1,873.90x = 3,529,285.25
  5. Step 5: Solve for x
    x = 3,529,285.25/1,873.90
  6. Step 6: Final answer
    x = 1,883.39

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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.