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Finding the Fourth Proportional to 391,114.84, 539,693.86 and 219,008.87

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Solution

The fourth proportional to 391,114.84, 539,693.86 and 219,008.87 is: 302,207.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,114.84 : 539,693.86 = 219,008.87 : x
  2. Step 2: Convert to fraction form
    391,114.84/539,693.86 = 219,008.87/x
  3. Step 3: Cross multiply
    391,114.84x = 539,693.86 × 219,008.87
  4. Step 4: Simplify right side
    391,114.84x = 118,197,743,226.25
  5. Step 5: Solve for x
    x = 118,197,743,226.25/391,114.84
  6. Step 6: Final answer
    x = 302,207.26

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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.