Home / 1,900.98-2,851.28-1,288.62

Finding the Fourth Proportional to 1,900.98, 2,851.28 and 1,288.62

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Solution

The fourth proportional to 1,900.98, 2,851.28 and 1,288.62 is: 1,932.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900.98 : 2,851.28 = 1,288.62 : x
  2. Step 2: Convert to fraction form
    1,900.98/2,851.28 = 1,288.62/x
  3. Step 3: Cross multiply
    1,900.98x = 2,851.28 × 1,288.62
  4. Step 4: Simplify right side
    1,900.98x = 3,674,216.43
  5. Step 5: Solve for x
    x = 3,674,216.43/1,900.98
  6. Step 6: Final answer
    x = 1,932.80

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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.