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Finding the Fourth Proportional to 2,728.71, 3,765.65 and 1,486.71

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Solution

The fourth proportional to 2,728.71, 3,765.65 and 1,486.71 is: 2,051.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.71 : 3,765.65 = 1,486.71 : x
  2. Step 2: Convert to fraction form
    2,728.71/3,765.65 = 1,486.71/x
  3. Step 3: Cross multiply
    2,728.71x = 3,765.65 × 1,486.71
  4. Step 4: Simplify right side
    2,728.71x = 5,598,422.08
  5. Step 5: Solve for x
    x = 5,598,422.08/2,728.71
  6. Step 6: Final answer
    x = 2,051.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.