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Finding the Fourth Proportional to 408,043.40, 612,065.10 and 404,106.80

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Solution

The fourth proportional to 408,043.40, 612,065.10 and 404,106.80 is: 606,160.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,043.40 : 612,065.10 = 404,106.80 : x
  2. Step 2: Convert to fraction form
    408,043.40/612,065.10 = 404,106.80/x
  3. Step 3: Cross multiply
    408,043.40x = 612,065.10 × 404,106.80
  4. Step 4: Simplify right side
    408,043.40x = 247,339,668,952.68
  5. Step 5: Solve for x
    x = 247,339,668,952.68/408,043.40
  6. Step 6: Final answer
    x = 606,160.20

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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.