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Finding the Fourth Proportional to 391,117.71, 539,697.82 and 219,011.75

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Solution

The fourth proportional to 391,117.71, 539,697.82 and 219,011.75 is: 302,211.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,117.71 : 539,697.82 = 219,011.75 : x
  2. Step 2: Convert to fraction form
    391,117.71/539,697.82 = 219,011.75/x
  3. Step 3: Cross multiply
    391,117.71x = 539,697.82 × 219,011.75
  4. Step 4: Simplify right side
    391,117.71x = 118,200,164,029.39
  5. Step 5: Solve for x
    x = 118,200,164,029.39/391,117.71
  6. Step 6: Final answer
    x = 302,211.23

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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.