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Finding the Fourth Proportional to 395,998.80, 593,998.20 and 218,851.80

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Solution

The fourth proportional to 395,998.80, 593,998.20 and 218,851.80 is: 328,277.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,998.80 : 593,998.20 = 218,851.80 : x
  2. Step 2: Convert to fraction form
    395,998.80/593,998.20 = 218,851.80/x
  3. Step 3: Cross multiply
    395,998.80x = 593,998.20 × 218,851.80
  4. Step 4: Simplify right side
    395,998.80x = 129,997,575,266.76
  5. Step 5: Solve for x
    x = 129,997,575,266.76/395,998.80
  6. Step 6: Final answer
    x = 328,277.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.