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Finding the Fourth Proportional to 405,969.30, 608,953.95 and 125,514.90

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Solution

The fourth proportional to 405,969.30, 608,953.95 and 125,514.90 is: 188,272.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,969.30 : 608,953.95 = 125,514.90 : x
  2. Step 2: Convert to fraction form
    405,969.30/608,953.95 = 125,514.90/x
  3. Step 3: Cross multiply
    405,969.30x = 608,953.95 × 125,514.90
  4. Step 4: Simplify right side
    405,969.30x = 76,432,794,138.86
  5. Step 5: Solve for x
    x = 76,432,794,138.86/405,969.30
  6. Step 6: Final answer
    x = 188,272.35

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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.