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Finding the Fourth Proportional to 408,045.40, 612,067.20 and 108,526.03

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Solution

The fourth proportional to 408,045.40, 612,067.20 and 108,526.03 is: 162,788.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,045.40 : 612,067.20 = 108,526.03 : x
  2. Step 2: Convert to fraction form
    408,045.40/612,067.20 = 108,526.03/x
  3. Step 3: Cross multiply
    408,045.40x = 612,067.20 × 108,526.03
  4. Step 4: Simplify right side
    408,045.40x = 66,425,223,309.22
  5. Step 5: Solve for x
    x = 66,425,223,309.22/408,045.40
  6. Step 6: Final answer
    x = 162,788.81

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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.