Home / 1,317.35-1,975.68-392.69

Finding the Fourth Proportional to 1,317.35, 1,975.68 and 392.69

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Solution

The fourth proportional to 1,317.35, 1,975.68 and 392.69 is: 588.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.35 : 1,975.68 = 392.69 : x
  2. Step 2: Convert to fraction form
    1,317.35/1,975.68 = 392.69/x
  3. Step 3: Cross multiply
    1,317.35x = 1,975.68 × 392.69
  4. Step 4: Simplify right side
    1,317.35x = 775,834.72
  5. Step 5: Solve for x
    x = 775,834.72/1,317.35
  6. Step 6: Final answer
    x = 588.93

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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.