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Finding the Fourth Proportional to 1,999.41, 2,760.65 and 1,291.67

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Solution

The fourth proportional to 1,999.41, 2,760.65 and 1,291.67 is: 1,783.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.41 : 2,760.65 = 1,291.67 : x
  2. Step 2: Convert to fraction form
    1,999.41/2,760.65 = 1,291.67/x
  3. Step 3: Cross multiply
    1,999.41x = 2,760.65 × 1,291.67
  4. Step 4: Simplify right side
    1,999.41x = 3,565,850.99
  5. Step 5: Solve for x
    x = 3,565,850.99/1,999.41
  6. Step 6: Final answer
    x = 1,783.45

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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.