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Finding the Fourth Proportional to 1,579.68, 2,368.49 and 838.85

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Solution

The fourth proportional to 1,579.68, 2,368.49 and 838.85 is: 1,257.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.68 : 2,368.49 = 838.85 : x
  2. Step 2: Convert to fraction form
    1,579.68/2,368.49 = 838.85/x
  3. Step 3: Cross multiply
    1,579.68x = 2,368.49 × 838.85
  4. Step 4: Simplify right side
    1,579.68x = 1,986,791.80
  5. Step 5: Solve for x
    x = 1,986,791.80/1,579.68
  6. Step 6: Final answer
    x = 1,257.72

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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.