Home / 1,611.14-2,223.18-947.75

Finding the Fourth Proportional to 1,611.14, 2,223.18 and 947.75

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Solution

The fourth proportional to 1,611.14, 2,223.18 and 947.75 is: 1,307.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.14 : 2,223.18 = 947.75 : x
  2. Step 2: Convert to fraction form
    1,611.14/2,223.18 = 947.75/x
  3. Step 3: Cross multiply
    1,611.14x = 2,223.18 × 947.75
  4. Step 4: Simplify right side
    1,611.14x = 2,107,007.73
  5. Step 5: Solve for x
    x = 2,107,007.73/1,611.14
  6. Step 6: Final answer
    x = 1,307.78

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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.