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Finding the Fourth Proportional to 2,556.86, 3,835.62 and 913.59

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Solution

The fourth proportional to 2,556.86, 3,835.62 and 913.59 is: 1,370.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,556.86 : 3,835.62 = 913.59 : x
  2. Step 2: Convert to fraction form
    2,556.86/3,835.62 = 913.59/x
  3. Step 3: Cross multiply
    2,556.86x = 3,835.62 × 913.59
  4. Step 4: Simplify right side
    2,556.86x = 3,504,184.08
  5. Step 5: Solve for x
    x = 3,504,184.08/2,556.86
  6. Step 6: Final answer
    x = 1,370.51

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1.5x scale

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.