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Finding the Fourth Proportional to 641,872.64, 885,811.91 and 355,392.73

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Solution

The fourth proportional to 641,872.64, 885,811.91 and 355,392.73 is: 490,457.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,872.64 : 885,811.91 = 355,392.73 : x
  2. Step 2: Convert to fraction form
    641,872.64/885,811.91 = 355,392.73/x
  3. Step 3: Cross multiply
    641,872.64x = 885,811.91 × 355,392.73
  4. Step 4: Simplify right side
    641,872.64x = 314,811,112,961.41
  5. Step 5: Solve for x
    x = 314,811,112,961.41/641,872.64
  6. Step 6: Final answer
    x = 490,457.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.