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Finding the Fourth Proportional to 383,937.40, 575,906.10 and 257,966.20

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Solution

The fourth proportional to 383,937.40, 575,906.10 and 257,966.20 is: 386,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,937.40 : 575,906.10 = 257,966.20 : x
  2. Step 2: Convert to fraction form
    383,937.40/575,906.10 = 257,966.20/x
  3. Step 3: Cross multiply
    383,937.40x = 575,906.10 × 257,966.20
  4. Step 4: Simplify right side
    383,937.40x = 148,564,308,173.82
  5. Step 5: Solve for x
    x = 148,564,308,173.82/383,937.40
  6. Step 6: Final answer
    x = 386,949.30

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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.