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Finding the Fourth Proportional to 661,654.60, 992,481.90 and 512,355.40

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Solution

The fourth proportional to 661,654.60, 992,481.90 and 512,355.40 is: 768,533.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,654.60 : 992,481.90 = 512,355.40 : x
  2. Step 2: Convert to fraction form
    661,654.60/992,481.90 = 512,355.40/x
  3. Step 3: Cross multiply
    661,654.60x = 992,481.90 × 512,355.40
  4. Step 4: Simplify right side
    661,654.60x = 508,503,460,867.26
  5. Step 5: Solve for x
    x = 508,503,460,867.26/661,654.60
  6. Step 6: Final answer
    x = 768,533.10

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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.