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Finding the Fourth Proportional to 578,327.15, 867,672.21 and 347,781.49

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Solution

The fourth proportional to 578,327.15, 867,672.21 and 347,781.49 is: 521,781.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,327.15 : 867,672.21 = 347,781.49 : x
  2. Step 2: Convert to fraction form
    578,327.15/867,672.21 = 347,781.49/x
  3. Step 3: Cross multiply
    578,327.15x = 867,672.21 × 347,781.49
  4. Step 4: Simplify right side
    578,327.15x = 301,760,334,025.39
  5. Step 5: Solve for x
    x = 301,760,334,025.39/578,327.15
  6. Step 6: Final answer
    x = 521,781.37

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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.