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Finding the Fourth Proportional to 407,743.80, 611,712.90 and 197,208.60

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Solution

The fourth proportional to 407,743.80, 611,712.90 and 197,208.60 is: 295,859.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,743.80 : 611,712.90 = 197,208.60 : x
  2. Step 2: Convert to fraction form
    407,743.80/611,712.90 = 197,208.60/x
  3. Step 3: Cross multiply
    407,743.80x = 611,712.90 × 197,208.60
  4. Step 4: Simplify right side
    407,743.80x = 120,635,044,610.94
  5. Step 5: Solve for x
    x = 120,635,044,610.94/407,743.80
  6. Step 6: Final answer
    x = 295,859.91

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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.