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Finding the Fourth Proportional to 391,475.44, 540,274.02 and 219,422.64

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Solution

The fourth proportional to 391,475.44, 540,274.02 and 219,422.64 is: 302,824.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,475.44 : 540,274.02 = 219,422.64 : x
  2. Step 2: Convert to fraction form
    391,475.44/540,274.02 = 219,422.64/x
  3. Step 3: Cross multiply
    391,475.44x = 540,274.02 × 219,422.64
  4. Step 4: Simplify right side
    391,475.44x = 118,548,351,791.81
  5. Step 5: Solve for x
    x = 118,548,351,791.81/391,475.44
  6. Step 6: Final answer
    x = 302,824.49

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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.