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Finding the Fourth Proportional to 558,698.88, 771,906.48 and 389,687.52

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Solution

The fourth proportional to 558,698.88, 771,906.48 and 389,687.52 is: 538,397.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,698.88 : 771,906.48 = 389,687.52 : x
  2. Step 2: Convert to fraction form
    558,698.88/771,906.48 = 389,687.52/x
  3. Step 3: Cross multiply
    558,698.88x = 771,906.48 × 389,687.52
  4. Step 4: Simplify right side
    558,698.88x = 300,802,321,863.13
  5. Step 5: Solve for x
    x = 300,802,321,863.13/558,698.88
  6. Step 6: Final answer
    x = 538,397.93

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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.