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Finding the Fourth Proportional to 653.99, 980.07 and 491.48

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Solution

The fourth proportional to 653.99, 980.07 and 491.48 is: 736.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.99 : 980.07 = 491.48 : x
  2. Step 2: Convert to fraction form
    653.99/980.07 = 491.48/x
  3. Step 3: Cross multiply
    653.99x = 980.07 × 491.48
  4. Step 4: Simplify right side
    653.99x = 481,686.03
  5. Step 5: Solve for x
    x = 481,686.03/653.99
  6. Step 6: Final answer
    x = 736.54

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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.