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Finding the Fourth Proportional to 384,991.26, 531,274.59 and 215,224.98

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Solution

The fourth proportional to 384,991.26, 531,274.59 and 215,224.98 is: 297,003.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,991.26 : 531,274.59 = 215,224.98 : x
  2. Step 2: Convert to fraction form
    384,991.26/531,274.59 = 215,224.98/x
  3. Step 3: Cross multiply
    384,991.26x = 531,274.59 × 215,224.98
  4. Step 4: Simplify right side
    384,991.26x = 114,343,563,007.26
  5. Step 5: Solve for x
    x = 114,343,563,007.26/384,991.26
  6. Step 6: Final answer
    x = 297,003.01

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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.