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Finding the Fourth Proportional to 427,554.40, 640,908.60 and 202,519.30

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Solution

The fourth proportional to 427,554.40, 640,908.60 and 202,519.30 is: 303,578.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,554.40 : 640,908.60 = 202,519.30 : x
  2. Step 2: Convert to fraction form
    427,554.40/640,908.60 = 202,519.30/x
  3. Step 3: Cross multiply
    427,554.40x = 640,908.60 × 202,519.30
  4. Step 4: Simplify right side
    427,554.40x = 129,796,361,035.98
  5. Step 5: Solve for x
    x = 129,796,361,035.98/427,554.40
  6. Step 6: Final answer
    x = 303,578.59

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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.