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Finding the Fourth Proportional to 383,605.60, 575,408.40 and 231,390.40

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Solution

The fourth proportional to 383,605.60, 575,408.40 and 231,390.40 is: 347,085.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,605.60 : 575,408.40 = 231,390.40 : x
  2. Step 2: Convert to fraction form
    383,605.60/575,408.40 = 231,390.40/x
  3. Step 3: Cross multiply
    383,605.60x = 575,408.40 × 231,390.40
  4. Step 4: Simplify right side
    383,605.60x = 133,143,979,839.36
  5. Step 5: Solve for x
    x = 133,143,979,839.36/383,605.60
  6. Step 6: Final answer
    x = 347,085.60

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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.