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Finding the Fourth Proportional to 590,387.88, 814,999.14 and 399,979.56

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Solution

The fourth proportional to 590,387.88, 814,999.14 and 399,979.56 is: 552,150.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    590,387.88 : 814,999.14 = 399,979.56 : x
  2. Step 2: Convert to fraction form
    590,387.88/814,999.14 = 399,979.56/x
  3. Step 3: Cross multiply
    590,387.88x = 814,999.14 × 399,979.56
  4. Step 4: Simplify right side
    590,387.88x = 325,982,997,417.58
  5. Step 5: Solve for x
    x = 325,982,997,417.58/590,387.88
  6. Step 6: Final answer
    x = 552,150.56

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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.