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Finding the Fourth Proportional to 653.86, 980.83 and 220.98

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Solution

The fourth proportional to 653.86, 980.83 and 220.98 is: 331.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.86 : 980.83 = 220.98 : x
  2. Step 2: Convert to fraction form
    653.86/980.83 = 220.98/x
  3. Step 3: Cross multiply
    653.86x = 980.83 × 220.98
  4. Step 4: Simplify right side
    653.86x = 216,743.81
  5. Step 5: Solve for x
    x = 216,743.81/653.86
  6. Step 6: Final answer
    x = 331.48

Related Problems

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Half scale
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Double scale
Find fourth proportional to 654.86, 982.33 and 221.98
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.