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Finding the Fourth Proportional to 653.51, 980.36 and 220.63

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Solution

The fourth proportional to 653.51, 980.36 and 220.63 is: 330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.51 : 980.36 = 220.63 : x
  2. Step 2: Convert to fraction form
    653.51/980.36 = 220.63/x
  3. Step 3: Cross multiply
    653.51x = 980.36 × 220.63
  4. Step 4: Simplify right side
    653.51x = 216,290.82
  5. Step 5: Solve for x
    x = 216,290.82/653.51
  6. Step 6: Final answer
    x = 330.97

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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.