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Finding the Fourth Proportional to 612,127.80, 918,191.70 and 444,166.20

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Solution

The fourth proportional to 612,127.80, 918,191.70 and 444,166.20 is: 666,249.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,127.80 : 918,191.70 = 444,166.20 : x
  2. Step 2: Convert to fraction form
    612,127.80/918,191.70 = 444,166.20/x
  3. Step 3: Cross multiply
    612,127.80x = 918,191.70 × 444,166.20
  4. Step 4: Simplify right side
    612,127.80x = 407,829,718,260.54
  5. Step 5: Solve for x
    x = 407,829,718,260.54/612,127.80
  6. Step 6: Final answer
    x = 666,249.30

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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.