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Finding the Fourth Proportional to 405,964.80, 608,889.60 and 125,510.40

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Solution

The fourth proportional to 405,964.80, 608,889.60 and 125,510.40 is: 188,247.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,964.80 : 608,889.60 = 125,510.40 : x
  2. Step 2: Convert to fraction form
    405,964.80/608,889.60 = 125,510.40/x
  3. Step 3: Cross multiply
    405,964.80x = 608,889.60 × 125,510.40
  4. Step 4: Simplify right side
    405,964.80x = 76,421,977,251.84
  5. Step 5: Solve for x
    x = 76,421,977,251.84/405,964.80
  6. Step 6: Final answer
    x = 188,247.79

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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.