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Finding the Fourth Proportional to 395,086.41, 592,648.65 and 128,846.43

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Solution

The fourth proportional to 395,086.41, 592,648.65 and 128,846.43 is: 193,275.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,086.41 : 592,648.65 = 128,846.43 : x
  2. Step 2: Convert to fraction form
    395,086.41/592,648.65 = 128,846.43/x
  3. Step 3: Cross multiply
    395,086.41x = 592,648.65 × 128,846.43
  4. Step 4: Simplify right side
    395,086.41x = 76,360,662,796.82
  5. Step 5: Solve for x
    x = 76,360,662,796.82/395,086.41
  6. Step 6: Final answer
    x = 193,275.85

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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.