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Finding the Fourth Proportional to 430,518.88, 645,379.68 and 190,505.56

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Solution

The fourth proportional to 430,518.88, 645,379.68 and 190,505.56 is: 285,581.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,518.88 : 645,379.68 = 190,505.56 : x
  2. Step 2: Convert to fraction form
    430,518.88/645,379.68 = 190,505.56/x
  3. Step 3: Cross multiply
    430,518.88x = 645,379.68 × 190,505.56
  4. Step 4: Simplify right side
    430,518.88x = 122,948,417,351.02
  5. Step 5: Solve for x
    x = 122,948,417,351.02/430,518.88
  6. Step 6: Final answer
    x = 285,581.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.