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Finding the Fourth Proportional to 395,138.32, 545,291.54 and 213,850.45

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Solution

The fourth proportional to 395,138.32, 545,291.54 and 213,850.45 is: 295,113.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,138.32 : 545,291.54 = 213,850.45 : x
  2. Step 2: Convert to fraction form
    395,138.32/545,291.54 = 213,850.45/x
  3. Step 3: Cross multiply
    395,138.32x = 545,291.54 × 213,850.45
  4. Step 4: Simplify right side
    395,138.32x = 116,610,839,760.14
  5. Step 5: Solve for x
    x = 116,610,839,760.14/395,138.32
  6. Step 6: Final answer
    x = 295,113.98

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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.