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Finding the Fourth Proportional to 402,625.88, 555,634.34 and 218,876.81

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Solution

The fourth proportional to 402,625.88, 555,634.34 and 218,876.81 is: 302,055.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,625.88 : 555,634.34 = 218,876.81 : x
  2. Step 2: Convert to fraction form
    402,625.88/555,634.34 = 218,876.81/x
  3. Step 3: Cross multiply
    402,625.88x = 555,634.34 × 218,876.81
  4. Step 4: Simplify right side
    402,625.88x = 121,615,469,634.68
  5. Step 5: Solve for x
    x = 121,615,469,634.68/402,625.88
  6. Step 6: Final answer
    x = 302,055.77

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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.