Home / 391,636.13-540,458.39-221,881.73

Finding the Fourth Proportional to 391,636.13, 540,458.39 and 221,881.73

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Solution

The fourth proportional to 391,636.13, 540,458.39 and 221,881.73 is: 306,197.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,636.13 : 540,458.39 = 221,881.73 : x
  2. Step 2: Convert to fraction form
    391,636.13/540,458.39 = 221,881.73/x
  3. Step 3: Cross multiply
    391,636.13x = 540,458.39 × 221,881.73
  4. Step 4: Simplify right side
    391,636.13x = 119,917,840,418.63
  5. Step 5: Solve for x
    x = 119,917,840,418.63/391,636.13
  6. Step 6: Final answer
    x = 306,197.09

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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.