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Finding the Fourth Proportional to 331,378.80, 496,938.60 and 120,908.40

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Solution

The fourth proportional to 331,378.80, 496,938.60 and 120,908.40 is: 181,315.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,378.80 : 496,938.60 = 120,908.40 : x
  2. Step 2: Convert to fraction form
    331,378.80/496,938.60 = 120,908.40/x
  3. Step 3: Cross multiply
    331,378.80x = 496,938.60 × 120,908.40
  4. Step 4: Simplify right side
    331,378.80x = 60,084,051,024.24
  5. Step 5: Solve for x
    x = 60,084,051,024.24/331,378.80
  6. Step 6: Final answer
    x = 181,315.31

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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.