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Finding the Fourth Proportional to 402,344.43, 555,235.97 and 218,583.72

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Solution

The fourth proportional to 402,344.43, 555,235.97 and 218,583.72 is: 301,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,344.43 : 555,235.97 = 218,583.72 : x
  2. Step 2: Convert to fraction form
    402,344.43/555,235.97 = 218,583.72/x
  3. Step 3: Cross multiply
    402,344.43x = 555,235.97 × 218,583.72
  4. Step 4: Simplify right side
    402,344.43x = 121,365,544,346.87
  5. Step 5: Solve for x
    x = 121,365,544,346.87/402,344.43
  6. Step 6: Final answer
    x = 301,645.89

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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.