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Finding the Fourth Proportional to 391,370.52, 540,093.44 and 221,637.72

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Solution

The fourth proportional to 391,370.52, 540,093.44 and 221,637.72 is: 305,861.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,370.52 : 540,093.44 = 221,637.72 : x
  2. Step 2: Convert to fraction form
    391,370.52/540,093.44 = 221,637.72/x
  3. Step 3: Cross multiply
    391,370.52x = 540,093.44 × 221,637.72
  4. Step 4: Simplify right side
    391,370.52x = 119,705,078,628.56
  5. Step 5: Solve for x
    x = 119,705,078,628.56/391,370.52
  6. Step 6: Final answer
    x = 305,861.26

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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.