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Finding the Fourth Proportional to 654.23, 981.48 and 221.38

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Solution

The fourth proportional to 654.23, 981.48 and 221.38 is: 332.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.23 : 981.48 = 221.38 : x
  2. Step 2: Convert to fraction form
    654.23/981.48 = 221.38/x
  3. Step 3: Cross multiply
    654.23x = 981.48 × 221.38
  4. Step 4: Simplify right side
    654.23x = 217,280.04
  5. Step 5: Solve for x
    x = 217,280.04/654.23
  6. Step 6: Final answer
    x = 332.12

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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.