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Finding the Fourth Proportional to 383,774.40, 575,143.20 and 257,054.40

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Solution

The fourth proportional to 383,774.40, 575,143.20 and 257,054.40 is: 385,234.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,774.40 : 575,143.20 = 257,054.40 : x
  2. Step 2: Convert to fraction form
    383,774.40/575,143.20 = 257,054.40/x
  3. Step 3: Cross multiply
    383,774.40x = 575,143.20 × 257,054.40
  4. Step 4: Simplify right side
    383,774.40x = 147,843,090,190.08
  5. Step 5: Solve for x
    x = 147,843,090,190.08/383,774.40
  6. Step 6: Final answer
    x = 385,234.37

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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.