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Finding the Fourth Proportional to 2,170, 2,994.60 and 1,238.48

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Solution

The fourth proportional to 2,170, 2,994.60 and 1,238.48 is: 1,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170 : 2,994.60 = 1,238.48 : x
  2. Step 2: Convert to fraction form
    2,170/2,994.60 = 1,238.48/x
  3. Step 3: Cross multiply
    2,170x = 2,994.60 × 1,238.48
  4. Step 4: Simplify right side
    2,170x = 3,708,752.21
  5. Step 5: Solve for x
    x = 3,708,752.21/2,170
  6. Step 6: Final answer
    x = 1,709.10

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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.