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Finding the Fourth Proportional to 408,390.72, 612,586.62 and 108,855.96

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Solution

The fourth proportional to 408,390.72, 612,586.62 and 108,855.96 is: 163,284.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,390.72 : 612,586.62 = 108,855.96 : x
  2. Step 2: Convert to fraction form
    408,390.72/612,586.62 = 108,855.96/x
  3. Step 3: Cross multiply
    408,390.72x = 612,586.62 × 108,855.96
  4. Step 4: Simplify right side
    408,390.72x = 66,683,704,603.26
  5. Step 5: Solve for x
    x = 66,683,704,603.26/408,390.72
  6. Step 6: Final answer
    x = 163,284.08

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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.