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Finding the Fourth Proportional to 231.40, 348.55 and 210.28

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Solution

The fourth proportional to 231.40, 348.55 and 210.28 is: 316.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.40 : 348.55 = 210.28 : x
  2. Step 2: Convert to fraction form
    231.40/348.55 = 210.28/x
  3. Step 3: Cross multiply
    231.40x = 348.55 × 210.28
  4. Step 4: Simplify right side
    231.40x = 73,293.09
  5. Step 5: Solve for x
    x = 73,293.09/231.40
  6. Step 6: Final answer
    x = 316.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.