Home / 1,317.27-1,975.89-439.99

Finding the Fourth Proportional to 1,317.27, 1,975.89 and 439.99

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Solution

The fourth proportional to 1,317.27, 1,975.89 and 439.99 is: 659.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.27 : 1,975.89 = 439.99 : x
  2. Step 2: Convert to fraction form
    1,317.27/1,975.89 = 439.99/x
  3. Step 3: Cross multiply
    1,317.27x = 1,975.89 × 439.99
  4. Step 4: Simplify right side
    1,317.27x = 869,371.84
  5. Step 5: Solve for x
    x = 869,371.84/1,317.27
  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.