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Finding the Fourth Proportional to 521,954.55, 720,128.88 and 307,147.41

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Solution

The fourth proportional to 521,954.55, 720,128.88 and 307,147.41 is: 423,764.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,954.55 : 720,128.88 = 307,147.41 : x
  2. Step 2: Convert to fraction form
    521,954.55/720,128.88 = 307,147.41/x
  3. Step 3: Cross multiply
    521,954.55x = 720,128.88 × 307,147.41
  4. Step 4: Simplify right side
    521,954.55x = 221,185,720,358.20
  5. Step 5: Solve for x
    x = 221,185,720,358.20/521,954.55
  6. Step 6: Final answer
    x = 423,764.33

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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.