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Finding the Fourth Proportional to 308,242.31, 462,363.47 and 86,626.31

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Solution

The fourth proportional to 308,242.31, 462,363.47 and 86,626.31 is: 129,939.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,242.31 : 462,363.47 = 86,626.31 : x
  2. Step 2: Convert to fraction form
    308,242.31/462,363.47 = 86,626.31/x
  3. Step 3: Cross multiply
    308,242.31x = 462,363.47 × 86,626.31
  4. Step 4: Simplify right side
    308,242.31x = 40,052,842,657.37
  5. Step 5: Solve for x
    x = 40,052,842,657.37/308,242.31
  6. Step 6: Final answer
    x = 129,939.47

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Similar ratio
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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.