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Finding the Fourth Proportional to 1,706.18, 2,556.90 and 779.42

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Solution

The fourth proportional to 1,706.18, 2,556.90 and 779.42 is: 1,168.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,706.18 : 2,556.90 = 779.42 : x
  2. Step 2: Convert to fraction form
    1,706.18/2,556.90 = 779.42/x
  3. Step 3: Cross multiply
    1,706.18x = 2,556.90 × 779.42
  4. Step 4: Simplify right side
    1,706.18x = 1,992,899.00
  5. Step 5: Solve for x
    x = 1,992,899.00/1,706.18
  6. Step 6: Final answer
    x = 1,168.05

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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.