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Finding the Fourth Proportional to 395,120.99, 545,268.35 and 213,832.86

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Solution

The fourth proportional to 395,120.99, 545,268.35 and 213,832.86 is: 295,090.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,120.99 : 545,268.35 = 213,832.86 : x
  2. Step 2: Convert to fraction form
    395,120.99/545,268.35 = 213,832.86/x
  3. Step 3: Cross multiply
    395,120.99x = 545,268.35 × 213,832.86
  4. Step 4: Simplify right side
    395,120.99x = 116,596,289,678.82
  5. Step 5: Solve for x
    x = 116,596,289,678.82/395,120.99
  6. Step 6: Final answer
    x = 295,090.10

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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.