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Finding the Fourth Proportional to 308,247.50, 462,371.26 and 86,631.50

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Solution

The fourth proportional to 308,247.50, 462,371.26 and 86,631.50 is: 129,947.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,247.50 : 462,371.26 = 86,631.50 : x
  2. Step 2: Convert to fraction form
    308,247.50/462,371.26 = 86,631.50/x
  3. Step 3: Cross multiply
    308,247.50x = 462,371.26 × 86,631.50
  4. Step 4: Simplify right side
    308,247.50x = 40,055,915,810.69
  5. Step 5: Solve for x
    x = 40,055,915,810.69/308,247.50
  6. Step 6: Final answer
    x = 129,947.25

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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.