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Finding the Fourth Proportional to 325,603.40, 488,380.80 and 136,014.80

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Solution

The fourth proportional to 325,603.40, 488,380.80 and 136,014.80 is: 204,012.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,603.40 : 488,380.80 = 136,014.80 : x
  2. Step 2: Convert to fraction form
    325,603.40/488,380.80 = 136,014.80/x
  3. Step 3: Cross multiply
    325,603.40x = 488,380.80 × 136,014.80
  4. Step 4: Simplify right side
    325,603.40x = 66,427,016,835.84
  5. Step 5: Solve for x
    x = 66,427,016,835.84/325,603.40
  6. Step 6: Final answer
    x = 204,012.05

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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.