Home / 1,211.70-1,817.46-345.96

Finding the Fourth Proportional to 1,211.70, 1,817.46 and 345.96

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Solution

The fourth proportional to 1,211.70, 1,817.46 and 345.96 is: 518.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.70 : 1,817.46 = 345.96 : x
  2. Step 2: Convert to fraction form
    1,211.70/1,817.46 = 345.96/x
  3. Step 3: Cross multiply
    1,211.70x = 1,817.46 × 345.96
  4. Step 4: Simplify right side
    1,211.70x = 628,768.46
  5. Step 5: Solve for x
    x = 628,768.46/1,211.70
  6. Step 6: Final answer
    x = 518.91

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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.