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Finding the Fourth Proportional to 612,070.80, 918,235.80 and 185,571.60

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Solution

The fourth proportional to 612,070.80, 918,235.80 and 185,571.60 is: 278,396.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,070.80 : 918,235.80 = 185,571.60 : x
  2. Step 2: Convert to fraction form
    612,070.80/918,235.80 = 185,571.60/x
  3. Step 3: Cross multiply
    612,070.80x = 918,235.80 × 185,571.60
  4. Step 4: Simplify right side
    612,070.80x = 170,398,486,583.28
  5. Step 5: Solve for x
    x = 170,398,486,583.28/612,070.80
  6. Step 6: Final answer
    x = 278,396.69

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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.