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Finding the Fourth Proportional to 395,099.87, 545,237.79 and 213,811.77

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Solution

The fourth proportional to 395,099.87, 545,237.79 and 213,811.77 is: 295,060.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,099.87 : 545,237.79 = 213,811.77 : x
  2. Step 2: Convert to fraction form
    395,099.87/545,237.79 = 213,811.77/x
  3. Step 3: Cross multiply
    395,099.87x = 545,237.79 × 213,811.77
  4. Step 4: Simplify right side
    395,099.87x = 116,578,256,950.79
  5. Step 5: Solve for x
    x = 116,578,256,950.79/395,099.87
  6. Step 6: Final answer
    x = 295,060.23

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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.