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Finding the Fourth Proportional to 612,100.80, 918,280.80 and 185,601.60

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Solution

The fourth proportional to 612,100.80, 918,280.80 and 185,601.60 is: 278,441.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,100.80 : 918,280.80 = 185,601.60 : x
  2. Step 2: Convert to fraction form
    612,100.80/918,280.80 = 185,601.60/x
  3. Step 3: Cross multiply
    612,100.80x = 918,280.80 × 185,601.60
  4. Step 4: Simplify right side
    612,100.80x = 170,434,385,729.28
  5. Step 5: Solve for x
    x = 170,434,385,729.28/612,100.80
  6. Step 6: Final answer
    x = 278,441.70

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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.