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Finding the Fourth Proportional to 308,761.50, 426,090.87 and 167,449.50

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Solution

The fourth proportional to 308,761.50, 426,090.87 and 167,449.50 is: 231,080.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,761.50 : 426,090.87 = 167,449.50 : x
  2. Step 2: Convert to fraction form
    308,761.50/426,090.87 = 167,449.50/x
  3. Step 3: Cross multiply
    308,761.50x = 426,090.87 × 167,449.50
  4. Step 4: Simplify right side
    308,761.50x = 71,348,703,136.07
  5. Step 5: Solve for x
    x = 71,348,703,136.07/308,761.50
  6. Step 6: Final answer
    x = 231,080.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.