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Finding the Fourth Proportional to 413,760.60, 620,640.90 and 203,808.60

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Solution

The fourth proportional to 413,760.60, 620,640.90 and 203,808.60 is: 305,712.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,760.60 : 620,640.90 = 203,808.60 : x
  2. Step 2: Convert to fraction form
    413,760.60/620,640.90 = 203,808.60/x
  3. Step 3: Cross multiply
    413,760.60x = 620,640.90 × 203,808.60
  4. Step 4: Simplify right side
    413,760.60x = 126,491,952,931.74
  5. Step 5: Solve for x
    x = 126,491,952,931.74/413,760.60
  6. Step 6: Final answer
    x = 305,712.90

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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.