Home / 391,868.47-540,771.44-219,786.77

Finding the Fourth Proportional to 391,868.47, 540,771.44 and 219,786.77

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Solution

The fourth proportional to 391,868.47, 540,771.44 and 219,786.77 is: 303,301.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,868.47 : 540,771.44 = 219,786.77 : x
  2. Step 2: Convert to fraction form
    391,868.47/540,771.44 = 219,786.77/x
  3. Step 3: Cross multiply
    391,868.47x = 540,771.44 × 219,786.77
  4. Step 4: Simplify right side
    391,868.47x = 118,854,405,317.00
  5. Step 5: Solve for x
    x = 118,854,405,317.00/391,868.47
  6. Step 6: Final answer
    x = 303,301.78

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1.5x scale

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.