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Finding the Fourth Proportional to 392,992.61, 589,634.88 and 272,986.33

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Solution

The fourth proportional to 392,992.61, 589,634.88 and 272,986.33 is: 409,580.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,992.61 : 589,634.88 = 272,986.33 : x
  2. Step 2: Convert to fraction form
    392,992.61/589,634.88 = 272,986.33/x
  3. Step 3: Cross multiply
    392,992.61x = 589,634.88 × 272,986.33
  4. Step 4: Simplify right side
    392,992.61x = 160,962,262,613.66
  5. Step 5: Solve for x
    x = 160,962,262,613.66/392,992.61
  6. Step 6: Final answer
    x = 409,580.89

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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.