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Finding the Fourth Proportional to 612,717.20, 919,075.80 and 470,999.60

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Solution

The fourth proportional to 612,717.20, 919,075.80 and 470,999.60 is: 706,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,717.20 : 919,075.80 = 470,999.60 : x
  2. Step 2: Convert to fraction form
    612,717.20/919,075.80 = 470,999.60/x
  3. Step 3: Cross multiply
    612,717.20x = 919,075.80 × 470,999.60
  4. Step 4: Simplify right side
    612,717.20x = 432,884,334,169.68
  5. Step 5: Solve for x
    x = 432,884,334,169.68/612,717.20
  6. Step 6: Final answer
    x = 706,499.40

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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.