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Finding the Fourth Proportional to 1,271.80, 1,908.06 and 752.26

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Solution

The fourth proportional to 1,271.80, 1,908.06 and 752.26 is: 1,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.80 : 1,908.06 = 752.26 : x
  2. Step 2: Convert to fraction form
    1,271.80/1,908.06 = 752.26/x
  3. Step 3: Cross multiply
    1,271.80x = 1,908.06 × 752.26
  4. Step 4: Simplify right side
    1,271.80x = 1,435,357.22
  5. Step 5: Solve for x
    x = 1,435,357.22/1,271.80
  6. Step 6: Final answer
    x = 1,128.60

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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.