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Finding the Fourth Proportional to 211.58, 289.48 and 210.68

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Solution

The fourth proportional to 211.58, 289.48 and 210.68 is: 288.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.58 : 289.48 = 210.68 : x
  2. Step 2: Convert to fraction form
    211.58/289.48 = 210.68/x
  3. Step 3: Cross multiply
    211.58x = 289.48 × 210.68
  4. Step 4: Simplify right side
    211.58x = 60,987.65
  5. Step 5: Solve for x
    x = 60,987.65/211.58
  6. Step 6: Final answer
    x = 288.25

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.