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Finding the Fourth Proportional to 403,696.80, 605,545.20 and 123,213.60

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Solution

The fourth proportional to 403,696.80, 605,545.20 and 123,213.60 is: 184,820.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,696.80 : 605,545.20 = 123,213.60 : x
  2. Step 2: Convert to fraction form
    403,696.80/605,545.20 = 123,213.60/x
  3. Step 3: Cross multiply
    403,696.80x = 605,545.20 × 123,213.60
  4. Step 4: Simplify right side
    403,696.80x = 74,611,404,054.72
  5. Step 5: Solve for x
    x = 74,611,404,054.72/403,696.80
  6. Step 6: Final answer
    x = 184,820.40

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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.