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Finding the Fourth Proportional to 395,121.61, 545,268.51 and 213,833.69

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Solution

The fourth proportional to 395,121.61, 545,268.51 and 213,833.69 is: 295,090.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,121.61 : 545,268.51 = 213,833.69 : x
  2. Step 2: Convert to fraction form
    395,121.61/545,268.51 = 213,833.69/x
  3. Step 3: Cross multiply
    395,121.61x = 545,268.51 × 213,833.69
  4. Step 4: Simplify right side
    395,121.61x = 116,596,774,273.18
  5. Step 5: Solve for x
    x = 116,596,774,273.18/395,121.61
  6. Step 6: Final answer
    x = 295,090.86

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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.