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Finding the Fourth Proportional to 654.01, 981.02 and 221.18

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Solution

The fourth proportional to 654.01, 981.02 and 221.18 is: 331.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.01 : 981.02 = 221.18 : x
  2. Step 2: Convert to fraction form
    654.01/981.02 = 221.18/x
  3. Step 3: Cross multiply
    654.01x = 981.02 × 221.18
  4. Step 4: Simplify right side
    654.01x = 216,980.90
  5. Step 5: Solve for x
    x = 216,980.90/654.01
  6. Step 6: Final answer
    x = 331.77

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.