Home / 3,781.40-5,672.70-1,316.92

Finding the Fourth Proportional to 3,781.40, 5,672.70 and 1,316.92

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Solution

The fourth proportional to 3,781.40, 5,672.70 and 1,316.92 is: 1,975.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.40 : 5,672.70 = 1,316.92 : x
  2. Step 2: Convert to fraction form
    3,781.40/5,672.70 = 1,316.92/x
  3. Step 3: Cross multiply
    3,781.40x = 5,672.70 × 1,316.92
  4. Step 4: Simplify right side
    3,781.40x = 7,470,481.19
  5. Step 5: Solve for x
    x = 7,470,481.19/3,781.40
  6. Step 6: Final answer
    x = 1,975.59

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1.5x scale

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.