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Finding the Fourth Proportional to 525,783.60, 788,675.40 and 399,812.40

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Solution

The fourth proportional to 525,783.60, 788,675.40 and 399,812.40 is: 599,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,783.60 : 788,675.40 = 399,812.40 : x
  2. Step 2: Convert to fraction form
    525,783.60/788,675.40 = 399,812.40/x
  3. Step 3: Cross multiply
    525,783.60x = 788,675.40 × 399,812.40
  4. Step 4: Simplify right side
    525,783.60x = 315,322,204,494.96
  5. Step 5: Solve for x
    x = 315,322,204,494.96/525,783.60
  6. Step 6: Final answer
    x = 599,718.60

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Double scale
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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.