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Finding the Fourth Proportional to 320,807.10, 481,391.40 and 221,047.14

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Solution

The fourth proportional to 320,807.10, 481,391.40 and 221,047.14 is: 331,695.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,807.10 : 481,391.40 = 221,047.14 : x
  2. Step 2: Convert to fraction form
    320,807.10/481,391.40 = 221,047.14/x
  3. Step 3: Cross multiply
    320,807.10x = 481,391.40 × 221,047.14
  4. Step 4: Simplify right side
    320,807.10x = 106,410,192,190.60
  5. Step 5: Solve for x
    x = 106,410,192,190.60/320,807.10
  6. Step 6: Final answer
    x = 331,695.25

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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.