Home / 1,199.60-1,656.21-979.08

Finding the Fourth Proportional to 1,199.60, 1,656.21 and 979.08

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Solution

The fourth proportional to 1,199.60, 1,656.21 and 979.08 is: 1,351.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.60 : 1,656.21 = 979.08 : x
  2. Step 2: Convert to fraction form
    1,199.60/1,656.21 = 979.08/x
  3. Step 3: Cross multiply
    1,199.60x = 1,656.21 × 979.08
  4. Step 4: Simplify right side
    1,199.60x = 1,621,562.09
  5. Step 5: Solve for x
    x = 1,621,562.09/1,199.60
  6. Step 6: Final answer
    x = 1,351.75

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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.