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Finding the Fourth Proportional to 281,620.98, 388,640.97 and 168,421.86

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Solution

The fourth proportional to 281,620.98, 388,640.97 and 168,421.86 is: 232,424.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,620.98 : 388,640.97 = 168,421.86 : x
  2. Step 2: Convert to fraction form
    281,620.98/388,640.97 = 168,421.86/x
  3. Step 3: Cross multiply
    281,620.98x = 388,640.97 × 168,421.86
  4. Step 4: Simplify right side
    281,620.98x = 65,455,635,039.60
  5. Step 5: Solve for x
    x = 65,455,635,039.60/281,620.98
  6. Step 6: Final answer
    x = 232,424.57

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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.