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Finding the Fourth Proportional to 263,881.32, 395,674.56 and 86,340.66

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Solution

The fourth proportional to 263,881.32, 395,674.56 and 86,340.66 is: 129,462.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,881.32 : 395,674.56 = 86,340.66 : x
  2. Step 2: Convert to fraction form
    263,881.32/395,674.56 = 86,340.66/x
  3. Step 3: Cross multiply
    263,881.32x = 395,674.56 × 86,340.66
  4. Step 4: Simplify right side
    263,881.32x = 34,162,802,655.61
  5. Step 5: Solve for x
    x = 34,162,802,655.61/263,881.32
  6. Step 6: Final answer
    x = 129,462.75

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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.