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Finding the Fourth Proportional to 395,021.27, 545,125.45 and 213,729.22

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Solution

The fourth proportional to 395,021.27, 545,125.45 and 213,729.22 is: 294,944.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,021.27 : 545,125.45 = 213,729.22 : x
  2. Step 2: Convert to fraction form
    395,021.27/545,125.45 = 213,729.22/x
  3. Step 3: Cross multiply
    395,021.27x = 545,125.45 × 213,729.22
  4. Step 4: Simplify right side
    395,021.27x = 116,509,237,230.65
  5. Step 5: Solve for x
    x = 116,509,237,230.65/395,021.27
  6. Step 6: Final answer
    x = 294,944.21

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1.5x scale

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.