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Finding the Fourth Proportional to 653.09, 979.68 and 190.87

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Solution

The fourth proportional to 653.09, 979.68 and 190.87 is: 286.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.09 : 979.68 = 190.87 : x
  2. Step 2: Convert to fraction form
    653.09/979.68 = 190.87/x
  3. Step 3: Cross multiply
    653.09x = 979.68 × 190.87
  4. Step 4: Simplify right side
    653.09x = 186,991.52
  5. Step 5: Solve for x
    x = 186,991.52/653.09
  6. Step 6: Final answer
    x = 286.32

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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.