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Finding the Fourth Proportional to 210.12, 289.97 and 115.60

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Solution

The fourth proportional to 210.12, 289.97 and 115.60 is: 159.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.12 : 289.97 = 115.60 : x
  2. Step 2: Convert to fraction form
    210.12/289.97 = 115.60/x
  3. Step 3: Cross multiply
    210.12x = 289.97 × 115.60
  4. Step 4: Simplify right side
    210.12x = 33,519.08
  5. Step 5: Solve for x
    x = 33,519.08/210.12
  6. Step 6: Final answer
    x = 159.52

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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.