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Finding the Fourth Proportional to 413,794.60, 620,807.10 and 203,439.40

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Solution

The fourth proportional to 413,794.60, 620,807.10 and 203,439.40 is: 305,215.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,794.60 : 620,807.10 = 203,439.40 : x
  2. Step 2: Convert to fraction form
    413,794.60/620,807.10 = 203,439.40/x
  3. Step 3: Cross multiply
    413,794.60x = 620,807.10 × 203,439.40
  4. Step 4: Simplify right side
    413,794.60x = 126,296,623,939.74
  5. Step 5: Solve for x
    x = 126,296,623,939.74/413,794.60
  6. Step 6: Final answer
    x = 305,215.74

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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.