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Finding the Fourth Proportional to 611,121.40, 916,682.10 and 453,657.40

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Solution

The fourth proportional to 611,121.40, 916,682.10 and 453,657.40 is: 680,486.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,121.40 : 916,682.10 = 453,657.40 : x
  2. Step 2: Convert to fraction form
    611,121.40/916,682.10 = 453,657.40/x
  3. Step 3: Cross multiply
    611,121.40x = 916,682.10 × 453,657.40
  4. Step 4: Simplify right side
    611,121.40x = 415,859,618,112.54
  5. Step 5: Solve for x
    x = 415,859,618,112.54/611,121.40
  6. Step 6: Final answer
    x = 680,486.10

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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.