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Finding the Fourth Proportional to 391,606.08, 540,382.80 and 217,181.28

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Solution

The fourth proportional to 391,606.08, 540,382.80 and 217,181.28 is: 299,691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,606.08 : 540,382.80 = 217,181.28 : x
  2. Step 2: Convert to fraction form
    391,606.08/540,382.80 = 217,181.28/x
  3. Step 3: Cross multiply
    391,606.08x = 540,382.80 × 217,181.28
  4. Step 4: Simplify right side
    391,606.08x = 117,361,028,193.98
  5. Step 5: Solve for x
    x = 117,361,028,193.98/391,606.08
  6. Step 6: Final answer
    x = 299,691.54

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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.