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Finding the Fourth Proportional to 643,876.22, 888,559.62 and 353,514.56

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Solution

The fourth proportional to 643,876.22, 888,559.62 and 353,514.56 is: 487,855.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,876.22 : 888,559.62 = 353,514.56 : x
  2. Step 2: Convert to fraction form
    643,876.22/888,559.62 = 353,514.56/x
  3. Step 3: Cross multiply
    643,876.22x = 888,559.62 × 353,514.56
  4. Step 4: Simplify right side
    643,876.22x = 314,118,763,098.07
  5. Step 5: Solve for x
    x = 314,118,763,098.07/643,876.22
  6. Step 6: Final answer
    x = 487,855.82

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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.