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Finding the Fourth Proportional to 653.37, 980.19 and 220.47

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Solution

The fourth proportional to 653.37, 980.19 and 220.47 is: 330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.37 : 980.19 = 220.47 : x
  2. Step 2: Convert to fraction form
    653.37/980.19 = 220.47/x
  3. Step 3: Cross multiply
    653.37x = 980.19 × 220.47
  4. Step 4: Simplify right side
    653.37x = 216,102.49
  5. Step 5: Solve for x
    x = 216,102.49/653.37
  6. Step 6: Final answer
    x = 330.75

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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.