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Finding the Fourth Proportional to 1,269.63, 1,751.77 and 955.65

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Solution

The fourth proportional to 1,269.63, 1,751.77 and 955.65 is: 1,318.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.63 : 1,751.77 = 955.65 : x
  2. Step 2: Convert to fraction form
    1,269.63/1,751.77 = 955.65/x
  3. Step 3: Cross multiply
    1,269.63x = 1,751.77 × 955.65
  4. Step 4: Simplify right side
    1,269.63x = 1,674,079.00
  5. Step 5: Solve for x
    x = 1,674,079.00/1,269.63
  6. Step 6: Final answer
    x = 1,318.56

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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.