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Finding the Fourth Proportional to 611,190,987.60, 916,786,481.40 and 611,190,987.60

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Solution

The fourth proportional to 611,190,987.60, 916,786,481.40 and 611,190,987.60 is: 916,786,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,190,987.60 : 916,786,481.40 = 611,190,987.60 : x
  2. Step 2: Convert to fraction form
    611,190,987.60/916,786,481.40 = 611,190,987.60/x
  3. Step 3: Cross multiply
    611,190,987.60x = 916,786,481.40 × 611,190,987.60
  4. Step 4: Simplify right side
    611,190,987.60x = 560,331,634,985,195,008
  5. Step 5: Solve for x
    x = 560,331,634,985,195,008/611,190,987.60
  6. Step 6: Final answer
    x = 916,786,481.40

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Double scale
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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.