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Finding the Fourth Proportional to 1,271.96, 1,908.39 and 450.02

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Solution

The fourth proportional to 1,271.96, 1,908.39 and 450.02 is: 675.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.96 : 1,908.39 = 450.02 : x
  2. Step 2: Convert to fraction form
    1,271.96/1,908.39 = 450.02/x
  3. Step 3: Cross multiply
    1,271.96x = 1,908.39 × 450.02
  4. Step 4: Simplify right side
    1,271.96x = 858,813.67
  5. Step 5: Solve for x
    x = 858,813.67/1,271.96
  6. Step 6: Final answer
    x = 675.19

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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.