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Finding the Fourth Proportional to 589,992.78, 814,188.52 and 321,720.78

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Solution

The fourth proportional to 589,992.78, 814,188.52 and 321,720.78 is: 443,973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    589,992.78 : 814,188.52 = 321,720.78 : x
  2. Step 2: Convert to fraction form
    589,992.78/814,188.52 = 321,720.78/x
  3. Step 3: Cross multiply
    589,992.78x = 814,188.52 × 321,720.78
  4. Step 4: Simplify right side
    589,992.78x = 261,941,365,721.45
  5. Step 5: Solve for x
    x = 261,941,365,721.45/589,992.78
  6. Step 6: Final answer
    x = 443,973.85

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Double scale
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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.