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Finding the Fourth Proportional to 210.56, 290.56 and 131.90

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Solution

The fourth proportional to 210.56, 290.56 and 131.90 is: 182.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.56 : 290.56 = 131.90 : x
  2. Step 2: Convert to fraction form
    210.56/290.56 = 131.90/x
  3. Step 3: Cross multiply
    210.56x = 290.56 × 131.90
  4. Step 4: Simplify right side
    210.56x = 38,324.86
  5. Step 5: Solve for x
    x = 38,324.86/210.56
  6. Step 6: Final answer
    x = 182.01

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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.