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Finding the Fourth Proportional to 550,387.40, 759,540.11 and 308,664.78

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Solution

The fourth proportional to 550,387.40, 759,540.11 and 308,664.78 is: 425,960.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,387.40 : 759,540.11 = 308,664.78 : x
  2. Step 2: Convert to fraction form
    550,387.40/759,540.11 = 308,664.78/x
  3. Step 3: Cross multiply
    550,387.40x = 759,540.11 × 308,664.78
  4. Step 4: Simplify right side
    550,387.40x = 234,443,279,411.00
  5. Step 5: Solve for x
    x = 234,443,279,411.00/550,387.40
  6. Step 6: Final answer
    x = 425,960.48

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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.