Home / 1,317.18-1,975.83-439.75

Finding the Fourth Proportional to 1,317.18, 1,975.83 and 439.75

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Solution

The fourth proportional to 1,317.18, 1,975.83 and 439.75 is: 659.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.18 : 1,975.83 = 439.75 : x
  2. Step 2: Convert to fraction form
    1,317.18/1,975.83 = 439.75/x
  3. Step 3: Cross multiply
    1,317.18x = 1,975.83 × 439.75
  4. Step 4: Simplify right side
    1,317.18x = 868,866.30
  5. Step 5: Solve for x
    x = 868,866.30/1,317.18
  6. Step 6: Final answer
    x = 659.64

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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.