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Finding the Fourth Proportional to 559,664.43, 839,496.60 and 138,940.29

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Solution

The fourth proportional to 559,664.43, 839,496.60 and 138,940.29 is: 208,410.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,664.43 : 839,496.60 = 138,940.29 : x
  2. Step 2: Convert to fraction form
    559,664.43/839,496.60 = 138,940.29/x
  3. Step 3: Cross multiply
    559,664.43x = 839,496.60 × 138,940.29
  4. Step 4: Simplify right side
    559,664.43x = 116,639,901,058.01
  5. Step 5: Solve for x
    x = 116,639,901,058.01/559,664.43
  6. Step 6: Final answer
    x = 208,410.42

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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.