Home / 1,317.12-1,975.86-439.33

Finding the Fourth Proportional to 1,317.12, 1,975.86 and 439.33

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Solution

The fourth proportional to 1,317.12, 1,975.86 and 439.33 is: 659.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.12 : 1,975.86 = 439.33 : x
  2. Step 2: Convert to fraction form
    1,317.12/1,975.86 = 439.33/x
  3. Step 3: Cross multiply
    1,317.12x = 1,975.86 × 439.33
  4. Step 4: Simplify right side
    1,317.12x = 868,054.57
  5. Step 5: Solve for x
    x = 868,054.57/1,317.12
  6. Step 6: Final answer
    x = 659.06

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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.