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Finding the Fourth Proportional to 3,778.74, 5,668.61 and 1,313.75

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Solution

The fourth proportional to 3,778.74, 5,668.61 and 1,313.75 is: 1,970.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,778.74 : 5,668.61 = 1,313.75 : x
  2. Step 2: Convert to fraction form
    3,778.74/5,668.61 = 1,313.75/x
  3. Step 3: Cross multiply
    3,778.74x = 5,668.61 × 1,313.75
  4. Step 4: Simplify right side
    3,778.74x = 7,447,101.48
  5. Step 5: Solve for x
    x = 7,447,101.48/3,778.74
  6. Step 6: Final answer
    x = 1,970.79

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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.