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Finding the Fourth Proportional to 395,221.92, 545,720.64 and 364,996.20

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Solution

The fourth proportional to 395,221.92, 545,720.64 and 364,996.20 is: 503,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,221.92 : 545,720.64 = 364,996.20 : x
  2. Step 2: Convert to fraction form
    395,221.92/545,720.64 = 364,996.20/x
  3. Step 3: Cross multiply
    395,221.92x = 545,720.64 × 364,996.20
  4. Step 4: Simplify right side
    395,221.92x = 199,185,959,861.57
  5. Step 5: Solve for x
    x = 199,185,959,861.57/395,221.92
  6. Step 6: Final answer
    x = 503,985.10

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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.