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Finding the Fourth Proportional to 653.83, 980.89 and 191.59

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Solution

The fourth proportional to 653.83, 980.89 and 191.59 is: 287.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.83 : 980.89 = 191.59 : x
  2. Step 2: Convert to fraction form
    653.83/980.89 = 191.59/x
  3. Step 3: Cross multiply
    653.83x = 980.89 × 191.59
  4. Step 4: Simplify right side
    653.83x = 187,928.72
  5. Step 5: Solve for x
    x = 187,928.72/653.83
  6. Step 6: Final answer
    x = 287.43

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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.