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Finding the Fourth Proportional to 1,260.19, 1,890.90 and 843.99

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Solution

The fourth proportional to 1,260.19, 1,890.90 and 843.99 is: 1,266.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.19 : 1,890.90 = 843.99 : x
  2. Step 2: Convert to fraction form
    1,260.19/1,890.90 = 843.99/x
  3. Step 3: Cross multiply
    1,260.19x = 1,890.90 × 843.99
  4. Step 4: Simplify right side
    1,260.19x = 1,595,900.69
  5. Step 5: Solve for x
    x = 1,595,900.69/1,260.19
  6. Step 6: Final answer
    x = 1,266.40

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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.