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Finding the Fourth Proportional to 391,119.58, 539,700.42 and 219,013.62

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Solution

The fourth proportional to 391,119.58, 539,700.42 and 219,013.62 is: 302,213.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,119.58 : 539,700.42 = 219,013.62 : x
  2. Step 2: Convert to fraction form
    391,119.58/539,700.42 = 219,013.62/x
  3. Step 3: Cross multiply
    391,119.58x = 539,700.42 × 219,013.62
  4. Step 4: Simplify right side
    391,119.58x = 118,201,742,699.72
  5. Step 5: Solve for x
    x = 118,201,742,699.72/391,119.58
  6. Step 6: Final answer
    x = 302,213.82

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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.