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Finding the Fourth Proportional to 538,408.43, 743,038.51 and 308,975.39

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Solution

The fourth proportional to 538,408.43, 743,038.51 and 308,975.39 is: 426,406.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,408.43 : 743,038.51 = 308,975.39 : x
  2. Step 2: Convert to fraction form
    538,408.43/743,038.51 = 308,975.39/x
  3. Step 3: Cross multiply
    538,408.43x = 743,038.51 × 308,975.39
  4. Step 4: Simplify right side
    538,408.43x = 229,580,611,476.49
  5. Step 5: Solve for x
    x = 229,580,611,476.49/538,408.43
  6. Step 6: Final answer
    x = 426,406.05

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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.