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Finding the Fourth Proportional to 258,289.98, 387,457.29 and 71,301.48

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Solution

The fourth proportional to 258,289.98, 387,457.29 and 71,301.48 is: 106,958.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,289.98 : 387,457.29 = 71,301.48 : x
  2. Step 2: Convert to fraction form
    258,289.98/387,457.29 = 71,301.48/x
  3. Step 3: Cross multiply
    258,289.98x = 387,457.29 × 71,301.48
  4. Step 4: Simplify right side
    258,289.98x = 27,626,278,213.79
  5. Step 5: Solve for x
    x = 27,626,278,213.79/258,289.98
  6. Step 6: Final answer
    x = 106,958.38

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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.