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Finding the Fourth Proportional to 518,877.20, 778,315.80 and 253,156.70

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Solution

The fourth proportional to 518,877.20, 778,315.80 and 253,156.70 is: 379,735.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,877.20 : 778,315.80 = 253,156.70 : x
  2. Step 2: Convert to fraction form
    518,877.20/778,315.80 = 253,156.70/x
  3. Step 3: Cross multiply
    518,877.20x = 778,315.80 × 253,156.70
  4. Step 4: Simplify right side
    518,877.20x = 197,035,859,485.86
  5. Step 5: Solve for x
    x = 197,035,859,485.86/518,877.20
  6. Step 6: Final answer
    x = 379,735.05

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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.