Home / 1,317.03-1,975.90-392.59

Finding the Fourth Proportional to 1,317.03, 1,975.90 and 392.59

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Solution

The fourth proportional to 1,317.03, 1,975.90 and 392.59 is: 588.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.03 : 1,975.90 = 392.59 : x
  2. Step 2: Convert to fraction form
    1,317.03/1,975.90 = 392.59/x
  3. Step 3: Cross multiply
    1,317.03x = 1,975.90 × 392.59
  4. Step 4: Simplify right side
    1,317.03x = 775,716.62
  5. Step 5: Solve for x
    x = 775,716.62/1,317.03
  6. Step 6: Final answer
    x = 588.99

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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.