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Finding the Fourth Proportional to 611,891.70, 917,837.55 and 543,657.30

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Solution

The fourth proportional to 611,891.70, 917,837.55 and 543,657.30 is: 815,485.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,891.70 : 917,837.55 = 543,657.30 : x
  2. Step 2: Convert to fraction form
    611,891.70/917,837.55 = 543,657.30/x
  3. Step 3: Cross multiply
    611,891.70x = 917,837.55 × 543,657.30
  4. Step 4: Simplify right side
    611,891.70x = 498,989,084,271.62
  5. Step 5: Solve for x
    x = 498,989,084,271.62/611,891.70
  6. Step 6: Final answer
    x = 815,485.95

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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.