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Finding the Fourth Proportional to 612,101.20, 918,151.80 and 191,419.60

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Solution

The fourth proportional to 612,101.20, 918,151.80 and 191,419.60 is: 287,129.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,101.20 : 918,151.80 = 191,419.60 : x
  2. Step 2: Convert to fraction form
    612,101.20/918,151.80 = 191,419.60/x
  3. Step 3: Cross multiply
    612,101.20x = 918,151.80 × 191,419.60
  4. Step 4: Simplify right side
    612,101.20x = 175,752,250,295.28
  5. Step 5: Solve for x
    x = 175,752,250,295.28/612,101.20
  6. Step 6: Final answer
    x = 287,129.40

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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.