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Finding the Fourth Proportional to 661,791.50, 913,290.69 and 371,421.08

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Solution

The fourth proportional to 661,791.50, 913,290.69 and 371,421.08 is: 512,571.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,791.50 : 913,290.69 = 371,421.08 : x
  2. Step 2: Convert to fraction form
    661,791.50/913,290.69 = 371,421.08/x
  3. Step 3: Cross multiply
    661,791.50x = 913,290.69 × 371,421.08
  4. Step 4: Simplify right side
    661,791.50x = 339,215,414,684.96
  5. Step 5: Solve for x
    x = 339,215,414,684.96/661,791.50
  6. Step 6: Final answer
    x = 512,571.43

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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.