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Finding the Fourth Proportional to 403,292.80, 605,230.80 and 225,611.20

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Solution

The fourth proportional to 403,292.80, 605,230.80 and 225,611.20 is: 338,579.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,292.80 : 605,230.80 = 225,611.20 : x
  2. Step 2: Convert to fraction form
    403,292.80/605,230.80 = 225,611.20/x
  3. Step 3: Cross multiply
    403,292.80x = 605,230.80 × 225,611.20
  4. Step 4: Simplify right side
    403,292.80x = 136,546,847,064.96
  5. Step 5: Solve for x
    x = 136,546,847,064.96/403,292.80
  6. Step 6: Final answer
    x = 338,579.93

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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.