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Finding the Fourth Proportional to 479,556.98, 661,804.66 and 261,778.57

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Solution

The fourth proportional to 479,556.98, 661,804.66 and 261,778.57 is: 361,263.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,556.98 : 661,804.66 = 261,778.57 : x
  2. Step 2: Convert to fraction form
    479,556.98/661,804.66 = 261,778.57/x
  3. Step 3: Cross multiply
    479,556.98x = 661,804.66 × 261,778.57
  4. Step 4: Simplify right side
    479,556.98x = 173,246,276,186.85
  5. Step 5: Solve for x
    x = 173,246,276,186.85/479,556.98
  6. Step 6: Final answer
    x = 361,263.17

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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.