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Finding the Fourth Proportional to 1,705.80, 2,354.19 and 1,235.19

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Solution

The fourth proportional to 1,705.80, 2,354.19 and 1,235.19 is: 1,704.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705.80 : 2,354.19 = 1,235.19 : x
  2. Step 2: Convert to fraction form
    1,705.80/2,354.19 = 1,235.19/x
  3. Step 3: Cross multiply
    1,705.80x = 2,354.19 × 1,235.19
  4. Step 4: Simplify right side
    1,705.80x = 2,907,871.95
  5. Step 5: Solve for x
    x = 2,907,871.95/1,705.80
  6. Step 6: Final answer
    x = 1,704.70

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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.