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Finding the Fourth Proportional to 623,991.60, 935,987.40 and 519,015.60

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Solution

The fourth proportional to 623,991.60, 935,987.40 and 519,015.60 is: 778,523.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,991.60 : 935,987.40 = 519,015.60 : x
  2. Step 2: Convert to fraction form
    623,991.60/935,987.40 = 519,015.60/x
  3. Step 3: Cross multiply
    623,991.60x = 935,987.40 × 519,015.60
  4. Step 4: Simplify right side
    623,991.60x = 485,792,062,003.44
  5. Step 5: Solve for x
    x = 485,792,062,003.44/623,991.60
  6. Step 6: Final answer
    x = 778,523.40

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Half scale
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Double scale
Find fourth proportional to 623,992.60, 935,988.90 and 519,016.60
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.