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Finding the Fourth Proportional to 642,764.68, 887,057.94 and 356,296.84

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Solution

The fourth proportional to 642,764.68, 887,057.94 and 356,296.84 is: 491,713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,764.68 : 887,057.94 = 356,296.84 : x
  2. Step 2: Convert to fraction form
    642,764.68/887,057.94 = 356,296.84/x
  3. Step 3: Cross multiply
    642,764.68x = 887,057.94 × 356,296.84
  4. Step 4: Simplify right side
    642,764.68x = 316,055,940,918.91
  5. Step 5: Solve for x
    x = 316,055,940,918.91/642,764.68
  6. Step 6: Final answer
    x = 491,713.30

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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.