Home / 1,354.05-1,868.94-911.79

Finding the Fourth Proportional to 1,354.05, 1,868.94 and 911.79

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Solution

The fourth proportional to 1,354.05, 1,868.94 and 911.79 is: 1,258.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.05 : 1,868.94 = 911.79 : x
  2. Step 2: Convert to fraction form
    1,354.05/1,868.94 = 911.79/x
  3. Step 3: Cross multiply
    1,354.05x = 1,868.94 × 911.79
  4. Step 4: Simplify right side
    1,354.05x = 1,704,080.80
  5. Step 5: Solve for x
    x = 1,704,080.80/1,354.05
  6. Step 6: Final answer
    x = 1,258.51

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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.