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Finding the Fourth Proportional to 664,259.70, 996,389.55 and 612,938.10

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Solution

The fourth proportional to 664,259.70, 996,389.55 and 612,938.10 is: 919,407.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,259.70 : 996,389.55 = 612,938.10 : x
  2. Step 2: Convert to fraction form
    664,259.70/996,389.55 = 612,938.10/x
  3. Step 3: Cross multiply
    664,259.70x = 996,389.55 × 612,938.10
  4. Step 4: Simplify right side
    664,259.70x = 610,725,117,636.86
  5. Step 5: Solve for x
    x = 610,725,117,636.86/664,259.70
  6. Step 6: Final answer
    x = 919,407.15

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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.