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Finding the Fourth Proportional to 408,779.04, 612,396.96 and 209,225.88

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Solution

The fourth proportional to 408,779.04, 612,396.96 and 209,225.88 is: 313,443.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,779.04 : 612,396.96 = 209,225.88 : x
  2. Step 2: Convert to fraction form
    408,779.04/612,396.96 = 209,225.88/x
  3. Step 3: Cross multiply
    408,779.04x = 612,396.96 × 209,225.88
  4. Step 4: Simplify right side
    408,779.04x = 128,129,292,865.33
  5. Step 5: Solve for x
    x = 128,129,292,865.33/408,779.04
  6. Step 6: Final answer
    x = 313,443.89

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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.