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Finding the Fourth Proportional to 1,763.98, 2,643.99 and 838.78

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Solution

The fourth proportional to 1,763.98, 2,643.99 and 838.78 is: 1,257.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,763.98 : 2,643.99 = 838.78 : x
  2. Step 2: Convert to fraction form
    1,763.98/2,643.99 = 838.78/x
  3. Step 3: Cross multiply
    1,763.98x = 2,643.99 × 838.78
  4. Step 4: Simplify right side
    1,763.98x = 2,217,725.93
  5. Step 5: Solve for x
    x = 2,217,725.93/1,763.98
  6. Step 6: Final answer
    x = 1,257.23

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1.5x scale

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.