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Finding the Fourth Proportional to 453,149.16, 679,679.66 and 137,608.80

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Solution

The fourth proportional to 453,149.16, 679,679.66 and 137,608.80 is: 206,399.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,149.16 : 679,679.66 = 137,608.80 : x
  2. Step 2: Convert to fraction form
    453,149.16/679,679.66 = 137,608.80/x
  3. Step 3: Cross multiply
    453,149.16x = 679,679.66 × 137,608.80
  4. Step 4: Simplify right side
    453,149.16x = 93,529,902,397.01
  5. Step 5: Solve for x
    x = 93,529,902,397.01/453,149.16
  6. Step 6: Final answer
    x = 206,399.81

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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.