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Finding the Fourth Proportional to 403,715.80, 605,427.90 and 203,969.80

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Solution

The fourth proportional to 403,715.80, 605,427.90 and 203,969.80 is: 305,881.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,715.80 : 605,427.90 = 203,969.80 : x
  2. Step 2: Convert to fraction form
    403,715.80/605,427.90 = 203,969.80/x
  3. Step 3: Cross multiply
    403,715.80x = 605,427.90 × 203,969.80
  4. Step 4: Simplify right side
    403,715.80x = 123,489,007,677.42
  5. Step 5: Solve for x
    x = 123,489,007,677.42/403,715.80
  6. Step 6: Final answer
    x = 305,881.04

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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.