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Finding the Fourth Proportional to 310,553.70, 428,579.30 and 174,630.43

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Solution

The fourth proportional to 310,553.70, 428,579.30 and 174,630.43 is: 240,998.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,553.70 : 428,579.30 = 174,630.43 : x
  2. Step 2: Convert to fraction form
    310,553.70/428,579.30 = 174,630.43/x
  3. Step 3: Cross multiply
    310,553.70x = 428,579.30 × 174,630.43
  4. Step 4: Simplify right side
    310,553.70x = 74,842,987,448.10
  5. Step 5: Solve for x
    x = 74,842,987,448.10/310,553.70
  6. Step 6: Final answer
    x = 240,998.54

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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.