Home / 391,447.22-540,179.08-221,682.56

Finding the Fourth Proportional to 391,447.22, 540,179.08 and 221,682.56

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Solution

The fourth proportional to 391,447.22, 540,179.08 and 221,682.56 is: 305,911.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,447.22 : 540,179.08 = 221,682.56 : x
  2. Step 2: Convert to fraction form
    391,447.22/540,179.08 = 221,682.56/x
  3. Step 3: Cross multiply
    391,447.22x = 540,179.08 × 221,682.56
  4. Step 4: Simplify right side
    391,447.22x = 119,748,278,057.74
  5. Step 5: Solve for x
    x = 119,748,278,057.74/391,447.22
  6. Step 6: Final answer
    x = 305,911.69

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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.