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Finding the Fourth Proportional to 257,638.40, 386,457.60 and 168,934.40

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Solution

The fourth proportional to 257,638.40, 386,457.60 and 168,934.40 is: 253,401.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,638.40 : 386,457.60 = 168,934.40 : x
  2. Step 2: Convert to fraction form
    257,638.40/386,457.60 = 168,934.40/x
  3. Step 3: Cross multiply
    257,638.40x = 386,457.60 × 168,934.40
  4. Step 4: Simplify right side
    257,638.40x = 65,285,982,781.44
  5. Step 5: Solve for x
    x = 65,285,982,781.44/257,638.40
  6. Step 6: Final answer
    x = 253,401.60

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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.