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Finding the Fourth Proportional to 451,185.60, 622,468.80 and 290,129.46

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Solution

The fourth proportional to 451,185.60, 622,468.80 and 290,129.46 is: 400,271.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,185.60 : 622,468.80 = 290,129.46 : x
  2. Step 2: Convert to fraction form
    451,185.60/622,468.80 = 290,129.46/x
  3. Step 3: Cross multiply
    451,185.60x = 622,468.80 × 290,129.46
  4. Step 4: Simplify right side
    451,185.60x = 180,596,536,810.85
  5. Step 5: Solve for x
    x = 180,596,536,810.85/451,185.60
  6. Step 6: Final answer
    x = 400,271.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.