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Finding the Fourth Proportional to 395,111.88, 545,254.35 and 213,823.80

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Solution

The fourth proportional to 395,111.88, 545,254.35 and 213,823.80 is: 295,076.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,111.88 : 545,254.35 = 213,823.80 : x
  2. Step 2: Convert to fraction form
    395,111.88/545,254.35 = 213,823.80/x
  3. Step 3: Cross multiply
    395,111.88x = 545,254.35 × 213,823.80
  4. Step 4: Simplify right side
    395,111.88x = 116,588,357,083.53
  5. Step 5: Solve for x
    x = 116,588,357,083.53/395,111.88
  6. Step 6: Final answer
    x = 295,076.82

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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.