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Finding the Fourth Proportional to 2,556.99, 3,835.91 and 913.09

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Solution

The fourth proportional to 2,556.99, 3,835.91 and 913.09 is: 1,369.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,556.99 : 3,835.91 = 913.09 : x
  2. Step 2: Convert to fraction form
    2,556.99/3,835.91 = 913.09/x
  3. Step 3: Cross multiply
    2,556.99x = 3,835.91 × 913.09
  4. Step 4: Simplify right side
    2,556.99x = 3,502,531.06
  5. Step 5: Solve for x
    x = 3,502,531.06/2,556.99
  6. Step 6: Final answer
    x = 1,369.79

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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.