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Finding the Fourth Proportional to 391,119.34, 539,700.06 and 219,013.38

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Solution

The fourth proportional to 391,119.34, 539,700.06 and 219,013.38 is: 302,213.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,119.34 : 539,700.06 = 219,013.38 : x
  2. Step 2: Convert to fraction form
    391,119.34/539,700.06 = 219,013.38/x
  3. Step 3: Cross multiply
    391,119.34x = 539,700.06 × 219,013.38
  4. Step 4: Simplify right side
    391,119.34x = 118,201,534,326.80
  5. Step 5: Solve for x
    x = 118,201,534,326.80/391,119.34
  6. Step 6: Final answer
    x = 302,213.47

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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.