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Finding the Fourth Proportional to 612,854.60, 919,281.90 and 192,129.80

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Solution

The fourth proportional to 612,854.60, 919,281.90 and 192,129.80 is: 288,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,854.60 : 919,281.90 = 192,129.80 : x
  2. Step 2: Convert to fraction form
    612,854.60/919,281.90 = 192,129.80/x
  3. Step 3: Cross multiply
    612,854.60x = 919,281.90 × 192,129.80
  4. Step 4: Simplify right side
    612,854.60x = 176,621,447,590.62
  5. Step 5: Solve for x
    x = 176,621,447,590.62/612,854.60
  6. Step 6: Final answer
    x = 288,194.70

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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.