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Finding the Fourth Proportional to 641,668.56, 885,491.80 and 355,182.48

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Solution

The fourth proportional to 641,668.56, 885,491.80 and 355,182.48 is: 490,145.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,668.56 : 885,491.80 = 355,182.48 : x
  2. Step 2: Convert to fraction form
    641,668.56/885,491.80 = 355,182.48/x
  3. Step 3: Cross multiply
    641,668.56x = 885,491.80 × 355,182.48
  4. Step 4: Simplify right side
    641,668.56x = 314,511,173,543.66
  5. Step 5: Solve for x
    x = 314,511,173,543.66/641,668.56
  6. Step 6: Final answer
    x = 490,145.84

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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.