Home / 1,316.85-1,975.57-392.43

Finding the Fourth Proportional to 1,316.85, 1,975.57 and 392.43

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Solution

The fourth proportional to 1,316.85, 1,975.57 and 392.43 is: 588.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.85 : 1,975.57 = 392.43 : x
  2. Step 2: Convert to fraction form
    1,316.85/1,975.57 = 392.43/x
  3. Step 3: Cross multiply
    1,316.85x = 1,975.57 × 392.43
  4. Step 4: Simplify right side
    1,316.85x = 775,272.94
  5. Step 5: Solve for x
    x = 775,272.94/1,316.85
  6. Step 6: Final answer
    x = 588.73

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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.