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Finding the Fourth Proportional to 405,911.20, 608,866.80 and 125,514.40

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Solution

The fourth proportional to 405,911.20, 608,866.80 and 125,514.40 is: 188,271.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,911.20 : 608,866.80 = 125,514.40 : x
  2. Step 2: Convert to fraction form
    405,911.20/608,866.80 = 125,514.40/x
  3. Step 3: Cross multiply
    405,911.20x = 608,866.80 × 125,514.40
  4. Step 4: Simplify right side
    405,911.20x = 76,421,551,081.92
  5. Step 5: Solve for x
    x = 76,421,551,081.92/405,911.20
  6. Step 6: Final answer
    x = 188,271.60

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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.