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Finding the Fourth Proportional to 519,256.20, 778,884.30 and 447,985.80

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Solution

The fourth proportional to 519,256.20, 778,884.30 and 447,985.80 is: 671,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,256.20 : 778,884.30 = 447,985.80 : x
  2. Step 2: Convert to fraction form
    519,256.20/778,884.30 = 447,985.80/x
  3. Step 3: Cross multiply
    519,256.20x = 778,884.30 × 447,985.80
  4. Step 4: Simplify right side
    519,256.20x = 348,929,106,242.94
  5. Step 5: Solve for x
    x = 348,929,106,242.94/519,256.20
  6. Step 6: Final answer
    x = 671,978.70

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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.