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Finding the Fourth Proportional to 354,138.88, 531,267.12 and 140,908.90

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Solution

The fourth proportional to 354,138.88, 531,267.12 and 140,908.90 is: 211,386.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,138.88 : 531,267.12 = 140,908.90 : x
  2. Step 2: Convert to fraction form
    354,138.88/531,267.12 = 140,908.90/x
  3. Step 3: Cross multiply
    354,138.88x = 531,267.12 × 140,908.90
  4. Step 4: Simplify right side
    354,138.88x = 74,860,265,485.37
  5. Step 5: Solve for x
    x = 74,860,265,485.37/354,138.88
  6. Step 6: Final answer
    x = 211,386.75

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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.