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Finding the Fourth Proportional to 1,679.21, 2,516.99 and 704.18

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Solution

The fourth proportional to 1,679.21, 2,516.99 and 704.18 is: 1,055.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.21 : 2,516.99 = 704.18 : x
  2. Step 2: Convert to fraction form
    1,679.21/2,516.99 = 704.18/x
  3. Step 3: Cross multiply
    1,679.21x = 2,516.99 × 704.18
  4. Step 4: Simplify right side
    1,679.21x = 1,772,414.02
  5. Step 5: Solve for x
    x = 1,772,414.02/1,679.21
  6. Step 6: Final answer
    x = 1,055.50

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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.