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Finding the Fourth Proportional to 1,259.56, 1,738.26 and 839.16

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Solution

The fourth proportional to 1,259.56, 1,738.26 and 839.16 is: 1,158.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.56 : 1,738.26 = 839.16 : x
  2. Step 2: Convert to fraction form
    1,259.56/1,738.26 = 839.16/x
  3. Step 3: Cross multiply
    1,259.56x = 1,738.26 × 839.16
  4. Step 4: Simplify right side
    1,259.56x = 1,458,678.26
  5. Step 5: Solve for x
    x = 1,458,678.26/1,259.56
  6. Step 6: Final answer
    x = 1,158.09

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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.