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Finding the Fourth Proportional to 641,648.70, 885,483.03 and 355,195.26

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Solution

The fourth proportional to 641,648.70, 885,483.03 and 355,195.26 is: 490,173.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,648.70 : 885,483.03 = 355,195.26 : x
  2. Step 2: Convert to fraction form
    641,648.70/885,483.03 = 355,195.26/x
  3. Step 3: Cross multiply
    641,648.70x = 885,483.03 × 355,195.26
  4. Step 4: Simplify right side
    641,648.70x = 314,519,375,066.44
  5. Step 5: Solve for x
    x = 314,519,375,066.44/641,648.70
  6. Step 6: Final answer
    x = 490,173.79

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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.