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Finding the Fourth Proportional to 408,033.40, 612,107.70 and 127,521.40

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Solution

The fourth proportional to 408,033.40, 612,107.70 and 127,521.40 is: 191,300.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,033.40 : 612,107.70 = 127,521.40 : x
  2. Step 2: Convert to fraction form
    408,033.40/612,107.70 = 127,521.40/x
  3. Step 3: Cross multiply
    408,033.40x = 612,107.70 × 127,521.40
  4. Step 4: Simplify right side
    408,033.40x = 78,056,830,854.78
  5. Step 5: Solve for x
    x = 78,056,830,854.78/408,033.40
  6. Step 6: Final answer
    x = 191,300.10

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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.