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Finding the Fourth Proportional to 518,540.80, 777,811.20 and 163,663.60

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Solution

The fourth proportional to 518,540.80, 777,811.20 and 163,663.60 is: 245,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,540.80 : 777,811.20 = 163,663.60 : x
  2. Step 2: Convert to fraction form
    518,540.80/777,811.20 = 163,663.60/x
  3. Step 3: Cross multiply
    518,540.80x = 777,811.20 × 163,663.60
  4. Step 4: Simplify right side
    518,540.80x = 127,299,381,112.32
  5. Step 5: Solve for x
    x = 127,299,381,112.32/518,540.80
  6. Step 6: Final answer
    x = 245,495.40

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Similar ratio
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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.