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Finding the Fourth Proportional to 427,175.69, 640,668.51 and 123,503.54

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Solution

The fourth proportional to 427,175.69, 640,668.51 and 123,503.54 is: 185,227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,175.69 : 640,668.51 = 123,503.54 : x
  2. Step 2: Convert to fraction form
    427,175.69/640,668.51 = 123,503.54/x
  3. Step 3: Cross multiply
    427,175.69x = 640,668.51 × 123,503.54
  4. Step 4: Simplify right side
    427,175.69x = 79,124,825,748.18
  5. Step 5: Solve for x
    x = 79,124,825,748.18/427,175.69
  6. Step 6: Final answer
    x = 185,227.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.