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Finding the Fourth Proportional to 2,661.12, 3,991.68 and 1,018.17

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Solution

The fourth proportional to 2,661.12, 3,991.68 and 1,018.17 is: 1,527.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.12 : 3,991.68 = 1,018.17 : x
  2. Step 2: Convert to fraction form
    2,661.12/3,991.68 = 1,018.17/x
  3. Step 3: Cross multiply
    2,661.12x = 3,991.68 × 1,018.17
  4. Step 4: Simplify right side
    2,661.12x = 4,064,208.83
  5. Step 5: Solve for x
    x = 4,064,208.83/2,661.12
  6. Step 6: Final answer
    x = 1,527.26

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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.