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Finding the Fourth Proportional to 612,115.60, 918,173.40 and 191,390.80

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Solution

The fourth proportional to 612,115.60, 918,173.40 and 191,390.80 is: 287,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,115.60 : 918,173.40 = 191,390.80 : x
  2. Step 2: Convert to fraction form
    612,115.60/918,173.40 = 191,390.80/x
  3. Step 3: Cross multiply
    612,115.60x = 918,173.40 × 191,390.80
  4. Step 4: Simplify right side
    612,115.60x = 175,729,941,564.72
  5. Step 5: Solve for x
    x = 175,729,941,564.72/612,115.60
  6. Step 6: Final answer
    x = 287,086.20

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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.