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Finding the Fourth Proportional to 519,990.60, 779,985.90 and 253,921.80

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Solution

The fourth proportional to 519,990.60, 779,985.90 and 253,921.80 is: 380,882.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,990.60 : 779,985.90 = 253,921.80 : x
  2. Step 2: Convert to fraction form
    519,990.60/779,985.90 = 253,921.80/x
  3. Step 3: Cross multiply
    519,990.60x = 779,985.90 × 253,921.80
  4. Step 4: Simplify right side
    519,990.60x = 198,055,423,702.62
  5. Step 5: Solve for x
    x = 198,055,423,702.62/519,990.60
  6. Step 6: Final answer
    x = 380,882.70

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Half scale
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Double scale
Find fourth proportional to 519,991.60, 779,987.40 and 253,922.80
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.