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Finding the Fourth Proportional to 648,057.80, 972,086.70 and 611,316.20

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Solution

The fourth proportional to 648,057.80, 972,086.70 and 611,316.20 is: 916,974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,057.80 : 972,086.70 = 611,316.20 : x
  2. Step 2: Convert to fraction form
    648,057.80/972,086.70 = 611,316.20/x
  3. Step 3: Cross multiply
    648,057.80x = 972,086.70 × 611,316.20
  4. Step 4: Simplify right side
    648,057.80x = 594,252,347,514.54
  5. Step 5: Solve for x
    x = 594,252,347,514.54/648,057.80
  6. Step 6: Final answer
    x = 916,974.30

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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.