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Finding the Fourth Proportional to 408,038.40, 612,056.70 and 108,519.03

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Solution

The fourth proportional to 408,038.40, 612,056.70 and 108,519.03 is: 162,778.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,038.40 : 612,056.70 = 108,519.03 : x
  2. Step 2: Convert to fraction form
    408,038.40/612,056.70 = 108,519.03/x
  3. Step 3: Cross multiply
    408,038.40x = 612,056.70 × 108,519.03
  4. Step 4: Simplify right side
    408,038.40x = 66,419,799,389.00
  5. Step 5: Solve for x
    x = 66,419,799,389.00/408,038.40
  6. Step 6: Final answer
    x = 162,778.31

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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.