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Finding the Fourth Proportional to 430,030.80, 644,296.44 and 261,194.40

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Solution

The fourth proportional to 430,030.80, 644,296.44 and 261,194.40 is: 391,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,030.80 : 644,296.44 = 261,194.40 : x
  2. Step 2: Convert to fraction form
    430,030.80/644,296.44 = 261,194.40/x
  3. Step 3: Cross multiply
    430,030.80x = 644,296.44 × 261,194.40
  4. Step 4: Simplify right side
    430,030.80x = 168,286,622,067.94
  5. Step 5: Solve for x
    x = 168,286,622,067.94/430,030.80
  6. Step 6: Final answer
    x = 391,336.21

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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.