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Finding the Fourth Proportional to 379,259.40, 521,768.34 and 368,761.80

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Solution

The fourth proportional to 379,259.40, 521,768.34 and 368,761.80 is: 507,326.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,259.40 : 521,768.34 = 368,761.80 : x
  2. Step 2: Convert to fraction form
    379,259.40/521,768.34 = 368,761.80/x
  3. Step 3: Cross multiply
    379,259.40x = 521,768.34 × 368,761.80
  4. Step 4: Simplify right side
    379,259.40x = 192,408,232,241.41
  5. Step 5: Solve for x
    x = 192,408,232,241.41/379,259.40
  6. Step 6: Final answer
    x = 507,326.21

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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.