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Finding the Fourth Proportional to 612,855.60, 919,283.40 and 192,130.80

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Solution

The fourth proportional to 612,855.60, 919,283.40 and 192,130.80 is: 288,196.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,855.60 : 919,283.40 = 192,130.80 : x
  2. Step 2: Convert to fraction form
    612,855.60/919,283.40 = 192,130.80/x
  3. Step 3: Cross multiply
    612,855.60x = 919,283.40 × 192,130.80
  4. Step 4: Simplify right side
    612,855.60x = 176,622,655,068.72
  5. Step 5: Solve for x
    x = 176,622,655,068.72/612,855.60
  6. Step 6: Final answer
    x = 288,196.20

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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.