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Finding the Fourth Proportional to 1,705.84, 2,556.81 and 829.19

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Solution

The fourth proportional to 1,705.84, 2,556.81 and 829.19 is: 1,242.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705.84 : 2,556.81 = 829.19 : x
  2. Step 2: Convert to fraction form
    1,705.84/2,556.81 = 829.19/x
  3. Step 3: Cross multiply
    1,705.84x = 2,556.81 × 829.19
  4. Step 4: Simplify right side
    1,705.84x = 2,120,068.50
  5. Step 5: Solve for x
    x = 2,120,068.50/1,705.84
  6. Step 6: Final answer
    x = 1,242.83

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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.