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Finding the Fourth Proportional to 391,475.55, 540,274.17 and 219,422.75

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Solution

The fourth proportional to 391,475.55, 540,274.17 and 219,422.75 is: 302,824.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,475.55 : 540,274.17 = 219,422.75 : x
  2. Step 2: Convert to fraction form
    391,475.55/540,274.17 = 219,422.75/x
  3. Step 3: Cross multiply
    391,475.55x = 540,274.17 × 219,422.75
  4. Step 4: Simplify right side
    391,475.55x = 118,548,442,256.83
  5. Step 5: Solve for x
    x = 118,548,442,256.83/391,475.55
  6. Step 6: Final answer
    x = 302,824.64

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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.