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Finding the Fourth Proportional to 1,958.76, 2,705.22 and 1,521.90

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Solution

The fourth proportional to 1,958.76, 2,705.22 and 1,521.90 is: 2,101.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.76 : 2,705.22 = 1,521.90 : x
  2. Step 2: Convert to fraction form
    1,958.76/2,705.22 = 1,521.90/x
  3. Step 3: Cross multiply
    1,958.76x = 2,705.22 × 1,521.90
  4. Step 4: Simplify right side
    1,958.76x = 4,117,074.32
  5. Step 5: Solve for x
    x = 4,117,074.32/1,958.76
  6. Step 6: Final answer
    x = 2,101.88

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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.