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Finding the Fourth Proportional to 355,668.77, 491,079.92 and 219,888.88

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Solution

The fourth proportional to 355,668.77, 491,079.92 and 219,888.88 is: 303,605.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,668.77 : 491,079.92 = 219,888.88 : x
  2. Step 2: Convert to fraction form
    355,668.77/491,079.92 = 219,888.88/x
  3. Step 3: Cross multiply
    355,668.77x = 491,079.92 × 219,888.88
  4. Step 4: Simplify right side
    355,668.77x = 107,983,011,272.15
  5. Step 5: Solve for x
    x = 107,983,011,272.15/355,668.77
  6. Step 6: Final answer
    x = 303,605.54

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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.