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Finding the Fourth Proportional to 653.89, 980.43 and 263.89

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Solution

The fourth proportional to 653.89, 980.43 and 263.89 is: 395.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.89 : 980.43 = 263.89 : x
  2. Step 2: Convert to fraction form
    653.89/980.43 = 263.89/x
  3. Step 3: Cross multiply
    653.89x = 980.43 × 263.89
  4. Step 4: Simplify right side
    653.89x = 258,725.67
  5. Step 5: Solve for x
    x = 258,725.67/653.89
  6. Step 6: Final answer
    x = 395.67

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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.