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Finding the Fourth Proportional to 1,269.35, 1,751.36 and 772.23

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Solution

The fourth proportional to 1,269.35, 1,751.36 and 772.23 is: 1,065.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.35 : 1,751.36 = 772.23 : x
  2. Step 2: Convert to fraction form
    1,269.35/1,751.36 = 772.23/x
  3. Step 3: Cross multiply
    1,269.35x = 1,751.36 × 772.23
  4. Step 4: Simplify right side
    1,269.35x = 1,352,448.87
  5. Step 5: Solve for x
    x = 1,352,448.87/1,269.35
  6. Step 6: Final answer
    x = 1,065.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.