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Finding the Fourth Proportional to 351,734.88, 485,178.48 and 287,297.76

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Solution

The fourth proportional to 351,734.88, 485,178.48 and 287,297.76 is: 396,294.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,734.88 : 485,178.48 = 287,297.76 : x
  2. Step 2: Convert to fraction form
    351,734.88/485,178.48 = 287,297.76/x
  3. Step 3: Cross multiply
    351,734.88x = 485,178.48 × 287,297.76
  4. Step 4: Simplify right side
    351,734.88x = 139,390,690,504.21
  5. Step 5: Solve for x
    x = 139,390,690,504.21/351,734.88
  6. Step 6: Final answer
    x = 396,294.76

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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.