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Finding the Fourth Proportional to 665,125.60, 997,688.40 and 578,520.40

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Solution

The fourth proportional to 665,125.60, 997,688.40 and 578,520.40 is: 867,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,125.60 : 997,688.40 = 578,520.40 : x
  2. Step 2: Convert to fraction form
    665,125.60/997,688.40 = 578,520.40/x
  3. Step 3: Cross multiply
    665,125.60x = 997,688.40 × 578,520.40
  4. Step 4: Simplify right side
    665,125.60x = 577,183,092,243.36
  5. Step 5: Solve for x
    x = 577,183,092,243.36/665,125.60
  6. Step 6: Final answer
    x = 867,780.60

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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.