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Finding the Fourth Proportional to 320,803.20, 481,204.80 and 221,270.40

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Solution

The fourth proportional to 320,803.20, 481,204.80 and 221,270.40 is: 331,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,803.20 : 481,204.80 = 221,270.40 : x
  2. Step 2: Convert to fraction form
    320,803.20/481,204.80 = 221,270.40/x
  3. Step 3: Cross multiply
    320,803.20x = 481,204.80 × 221,270.40
  4. Step 4: Simplify right side
    320,803.20x = 106,476,378,577.92
  5. Step 5: Solve for x
    x = 106,476,378,577.92/320,803.20
  6. Step 6: Final answer
    x = 331,905.60

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1.5x scale

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.