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Finding the Fourth Proportional to 665,091.60, 997,637.40 and 399,152.40

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Solution

The fourth proportional to 665,091.60, 997,637.40 and 399,152.40 is: 598,728.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,091.60 : 997,637.40 = 399,152.40 : x
  2. Step 2: Convert to fraction form
    665,091.60/997,637.40 = 399,152.40/x
  3. Step 3: Cross multiply
    665,091.60x = 997,637.40 × 399,152.40
  4. Step 4: Simplify right side
    665,091.60x = 398,209,362,539.76
  5. Step 5: Solve for x
    x = 398,209,362,539.76/665,091.60
  6. Step 6: Final answer
    x = 598,728.60

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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.