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Finding the Fourth Proportional to 263,886.48, 395,903.28 and 86,404.80

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Solution

The fourth proportional to 263,886.48, 395,903.28 and 86,404.80 is: 129,631.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,886.48 : 395,903.28 = 86,404.80 : x
  2. Step 2: Convert to fraction form
    263,886.48/395,903.28 = 86,404.80/x
  3. Step 3: Cross multiply
    263,886.48x = 395,903.28 × 86,404.80
  4. Step 4: Simplify right side
    263,886.48x = 34,207,943,727.74
  5. Step 5: Solve for x
    x = 34,207,943,727.74/263,886.48
  6. Step 6: Final answer
    x = 129,631.29

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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.