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Finding the Fourth Proportional to 308,252.25, 462,378.38 and 86,636.25

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Solution

The fourth proportional to 308,252.25, 462,378.38 and 86,636.25 is: 129,954.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,252.25 : 462,378.38 = 86,636.25 : x
  2. Step 2: Convert to fraction form
    308,252.25/462,378.38 = 86,636.25/x
  3. Step 3: Cross multiply
    308,252.25x = 462,378.38 × 86,636.25
  4. Step 4: Simplify right side
    308,252.25x = 40,058,728,491.09
  5. Step 5: Solve for x
    x = 40,058,728,491.09/308,252.25
  6. Step 6: Final answer
    x = 129,954.38

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1.5x scale

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.