Home / 1,317.48-1,976.33-439.96

Finding the Fourth Proportional to 1,317.48, 1,976.33 and 439.96

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Solution

The fourth proportional to 1,317.48, 1,976.33 and 439.96 is: 659.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.48 : 1,976.33 = 439.96 : x
  2. Step 2: Convert to fraction form
    1,317.48/1,976.33 = 439.96/x
  3. Step 3: Cross multiply
    1,317.48x = 1,976.33 × 439.96
  4. Step 4: Simplify right side
    1,317.48x = 869,506.15
  5. Step 5: Solve for x
    x = 869,506.15/1,317.48
  6. Step 6: Final answer
    x = 659.98

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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.