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Finding the Fourth Proportional to 1,809.21, 2,712.99 and 713.38

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Solution

The fourth proportional to 1,809.21, 2,712.99 and 713.38 is: 1,069.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.21 : 2,712.99 = 713.38 : x
  2. Step 2: Convert to fraction form
    1,809.21/2,712.99 = 713.38/x
  3. Step 3: Cross multiply
    1,809.21x = 2,712.99 × 713.38
  4. Step 4: Simplify right side
    1,809.21x = 1,935,392.81
  5. Step 5: Solve for x
    x = 1,935,392.81/1,809.21
  6. Step 6: Final answer
    x = 1,069.74

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.