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Finding the Fourth Proportional to 2,556.56, 3,833.90 and 912.66

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Solution

The fourth proportional to 2,556.56, 3,833.90 and 912.66 is: 1,368.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,556.56 : 3,833.90 = 912.66 : x
  2. Step 2: Convert to fraction form
    2,556.56/3,833.90 = 912.66/x
  3. Step 3: Cross multiply
    2,556.56x = 3,833.90 × 912.66
  4. Step 4: Simplify right side
    2,556.56x = 3,499,047.17
  5. Step 5: Solve for x
    x = 3,499,047.17/2,556.56
  6. Step 6: Final answer
    x = 1,368.65

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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.