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Finding the Fourth Proportional to 210.79, 290.94 and 190.03

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Solution

The fourth proportional to 210.79, 290.94 and 190.03 is: 262.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.79 : 290.94 = 190.03 : x
  2. Step 2: Convert to fraction form
    210.79/290.94 = 190.03/x
  3. Step 3: Cross multiply
    210.79x = 290.94 × 190.03
  4. Step 4: Simplify right side
    210.79x = 55,285.40
  5. Step 5: Solve for x
    x = 55,285.40/210.79
  6. Step 6: Final answer
    x = 262.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.