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Finding the Fourth Proportional to 221,197.55, 331,796.23 and 54,985.55

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Solution

The fourth proportional to 221,197.55, 331,796.23 and 54,985.55 is: 82,478.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,197.55 : 331,796.23 = 54,985.55 : x
  2. Step 2: Convert to fraction form
    221,197.55/331,796.23 = 54,985.55/x
  3. Step 3: Cross multiply
    221,197.55x = 331,796.23 × 54,985.55
  4. Step 4: Simplify right side
    221,197.55x = 18,243,996,398.03
  5. Step 5: Solve for x
    x = 18,243,996,398.03/221,197.55
  6. Step 6: Final answer
    x = 82,478.30

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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.