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Finding the Fourth Proportional to 431,703.30, 648,138.15 and 274,239.30

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Solution

The fourth proportional to 431,703.30, 648,138.15 and 274,239.30 is: 411,729.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,703.30 : 648,138.15 = 274,239.30 : x
  2. Step 2: Convert to fraction form
    431,703.30/648,138.15 = 274,239.30/x
  3. Step 3: Cross multiply
    431,703.30x = 648,138.15 × 274,239.30
  4. Step 4: Simplify right side
    431,703.30x = 177,744,952,559.30
  5. Step 5: Solve for x
    x = 177,744,952,559.30/431,703.30
  6. Step 6: Final answer
    x = 411,729.43

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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.