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Finding the Fourth Proportional to 395,426.70, 545,686.14 and 214,134.48

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Solution

The fourth proportional to 395,426.70, 545,686.14 and 214,134.48 is: 295,504.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,426.70 : 545,686.14 = 214,134.48 : x
  2. Step 2: Convert to fraction form
    395,426.70/545,686.14 = 214,134.48/x
  3. Step 3: Cross multiply
    395,426.70x = 545,686.14 × 214,134.48
  4. Step 4: Simplify right side
    395,426.70x = 116,850,217,832.11
  5. Step 5: Solve for x
    x = 116,850,217,832.11/395,426.70
  6. Step 6: Final answer
    x = 295,504.12

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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.